mirror of
https://github.com/isometimes/rpi4-osdev
synced 2024-11-21 17:50:40 +00:00
part7-bluetooth now scanning and showing found addresses
This commit is contained in:
Adam Greenwood-Byrne
parent
724c77758e
commit
46b8b14186
5 changed files with 212 additions and 94 deletions
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@ -18,11 +18,14 @@ enum {
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ARM_UART0_ICR = ARM_UART0_BASE + 0x44
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};
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unsigned char lo(unsigned int val) { return (unsigned char)(val & 0xff); }
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unsigned char hi(unsigned int val) { return (unsigned char)((val & 0xff00) >> 8); }
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unsigned int bt_isReadByteReady() { return (!(mmio_read(ARM_UART0_FR) & 0x10)); }
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unsigned char bt_readByte()
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{
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unsigned char ch = mmio_read(ARM_UART0_DR) & 0xff;
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unsigned char ch = lo(mmio_read(ARM_UART0_DR));
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return ch;
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}
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@ -63,3 +66,114 @@ void bt_init()
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wait_msec(0x100000);
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}
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// HOST SETUP
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enum {
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OGF_HOST_CONTROL = 0x03,
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OGF_LE_CONTROL = 0x08,
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OGF_VENDOR = 0x3f,
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COMMAND_RESET_CHIP = 0x03,
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COMMAND_LOAD_FIRMWARE = 0x2e,
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HCI_COMMAND_PKT = 0x01,
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HCI_EVENT_PKT = 0x04,
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COMMAND_COMPLETE_CODE = 0x0e,
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LL_SCAN_ACTIVE = 0x01
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};
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unsigned char empty[] = {};
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int hciCommandBytes(unsigned char *opcodebytes, unsigned char *data, unsigned char length)
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{
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unsigned char c=0;
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bt_writeByte(HCI_COMMAND_PKT);
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bt_writeByte(opcodebytes[0]);
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bt_writeByte(opcodebytes[1]);
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bt_writeByte(length);
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while (c++<length) bt_writeByte(*data++);
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if (bt_waitReadByte() != HCI_EVENT_PKT) return 0;
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if (bt_waitReadByte() != COMMAND_COMPLETE_CODE) return 0;
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if (bt_waitReadByte() != 4) return 0;
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if (bt_waitReadByte() == 0) return 0;
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if (bt_waitReadByte() != opcodebytes[0]) return 0;
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if (bt_waitReadByte() != opcodebytes[1]) return 0;
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if (bt_waitReadByte() != 0) return 0;
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return 1;
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}
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int hciCommand(unsigned short ogf, unsigned short ocf, unsigned char *data, unsigned char length)
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{
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unsigned short opcode = ogf << 10 | ocf;
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unsigned char opcodebytes[2] = { lo(opcode), hi(opcode) };
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return hciCommandBytes(opcodebytes, data, length);
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}
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void bt_loadfirmware()
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{
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if (!hciCommand(OGF_VENDOR, COMMAND_LOAD_FIRMWARE, empty, 0)) uart_writeText("loadFirmware() failed\n");
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extern unsigned char _binary_BCM4345C0_hcd_start[];
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extern unsigned char _binary_BCM4345C0_hcd_size[];
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unsigned int c=0;
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unsigned int size = (long)&_binary_BCM4345C0_hcd_size;
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while (c < size) {
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unsigned char opcodebytes[] = { _binary_BCM4345C0_hcd_start[c], _binary_BCM4345C0_hcd_start[c+1] };
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unsigned char length = _binary_BCM4345C0_hcd_start[c+2];
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unsigned char *data = &(_binary_BCM4345C0_hcd_start[c+3]);
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if (!hciCommandBytes(opcodebytes, data, length)) {
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uart_writeText("Firmware data load failed\n");
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break;
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}
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c += 3 + length;
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}
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wait_msec(0x100000);
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}
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void setLEeventmask(unsigned char mask)
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{
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unsigned char params[] = { mask, 0, 0, 0, 0, 0, 0, 0 };
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if (!hciCommand(OGF_LE_CONTROL, 0x01, params, 8)) uart_writeText("setLEeventmask failed\n");
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}
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void setLEscanenable(unsigned char state, unsigned char duplicates) {
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unsigned char params[] = { state, duplicates };
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if (!hciCommand(OGF_LE_CONTROL, 0x0c, params, 2)) uart_writeText("setLEscanenable failed\n");
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}
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void setLEscanparameters(unsigned char type, unsigned char linterval, unsigned char hinterval, unsigned char lwindow, unsigned char hwindow, unsigned char own_address_type, unsigned char filter_policy) {
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unsigned char params[] = { type, linterval, hinterval, lwindow, hwindow, own_address_type, filter_policy };
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if (!hciCommand(OGF_LE_CONTROL, 0x0b, params, 7)) uart_writeText("setLEscanparameters failed\n");
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}
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void startActiveScanning() {
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float BleScanUnitsPerSecond = 1600;
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float BleScanInterval = 0.8;
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float BleScanWindow = 0.4;
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unsigned int p = BleScanInterval * BleScanUnitsPerSecond;
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unsigned int q = BleScanWindow * BleScanUnitsPerSecond;
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setLEscanparameters(LL_SCAN_ACTIVE, lo(p), hi(p), lo(q), hi(q), 0, 0);
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setLEscanenable(1, 0);
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}
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void stopScanning() {
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setLEscanenable(0, 0);
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}
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void bt_reset() {
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if (!hciCommand(OGF_HOST_CONTROL, COMMAND_RESET_CHIP, empty, 0)) uart_writeText("bt_reset() failed\n");
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}
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@ -1,3 +1,7 @@
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unsigned char bt_waitReadByte();
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void bt_writeByte(unsigned char byte);
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void bt_reset();
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void bt_init();
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void bt_loadfirmware();
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void setLEeventmask(unsigned char mask);
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void startActiveScanning();
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unsigned int bt_isReadByteReady();
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unsigned char bt_readByte();
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@ -147,8 +147,8 @@ void uart_writeByteBlocking(unsigned char ch) {
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void uart_writeText(char *buffer) {
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while (*buffer) {
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if (*buffer == '\n') uart_writeByteBlocking('\r');
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uart_writeByteBlocking(*buffer++);
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if (*buffer == '\n') uart_writeByteBlockingActual('\r');
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uart_writeByteBlockingActual(*buffer++);
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}
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}
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@ -174,6 +174,6 @@ void uart_hex(unsigned int d) {
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// 0-9 => '0'-'9', 10-15 => 'A'-'F'
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n+=n>9?0x37:0x30;
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uart_writeByteBlocking(n);
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uart_writeByteBlockingActual(n);
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}
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}
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@ -5,7 +5,7 @@ void uart_writeText(char *buffer);
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void uart_loadOutputFifo();
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unsigned char uart_readByte();
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unsigned int uart_isReadByteReady();
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void uart_writeByteBlocking(unsigned char ch);
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void uart_writeByteBlockingActual(unsigned char ch);
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void uart_update();
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void mmio_write(long reg, unsigned int val);
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unsigned int mmio_read(long reg);
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@ -1,122 +1,122 @@
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#include "io.h"
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#include "fb.h"
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#include "bt.h"
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#define MAX_MSG_LEN 50
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#define MAX_READ_RUN 100
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unsigned char data_buf[MAX_MSG_LEN];
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unsigned int data_len;
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unsigned int messages_received = 0;
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unsigned int poll_state = 0;
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enum {
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OGF_HOST_CONTROL = 0x03,
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OGF_LE_CONTROL = 0x08,
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OGF_VENDOR = 0x3f,
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COMMAND_RESET_CHIP = 0x03,
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VENDOR_LOAD_FIRMWARE = 0x2e,
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HCI_COMMAND_PKT = 0x01,
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HCI_EVENT_PKT = 0x04,
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LL_SCAN_ACTIVE = 0x01,
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EVENT_TYPE_COMMAND_STATUS = 0x0e
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LE_EVENT_CODE = 0x3e,
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LE_ADREPORT_CODE = 0x02,
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HCI_EVENT_PKT = 0x04
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};
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unsigned char lo(unsigned int val) { return (unsigned char)(val & 0xff); }
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unsigned char hi(unsigned int val) { return (unsigned char)((val & 0xff00) >> 8); }
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unsigned char empty[] = {};
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int hciCommandBytes(unsigned char *opcodebytes, unsigned char *data, unsigned char length)
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void poll2(unsigned char byte)
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{
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unsigned char c=0;
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bt_writeByte(HCI_COMMAND_PKT);
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bt_writeByte(opcodebytes[0]);
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bt_writeByte(opcodebytes[1]);
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bt_writeByte(length);
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while (c++<length) bt_writeByte(*data++);
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if (bt_waitReadByte() != HCI_EVENT_PKT) return 0;
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if (bt_waitReadByte() != EVENT_TYPE_COMMAND_STATUS) return 0;
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if (bt_waitReadByte() != 4) return 0;
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if (bt_waitReadByte() == 0) return 0;
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if (bt_waitReadByte() != opcodebytes[0]) return 0;
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if (bt_waitReadByte() != opcodebytes[1]) return 0;
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if (bt_waitReadByte() != 0) return 0;
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return 1;
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switch (poll_state) {
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case 0:
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if (byte != HCI_EVENT_PKT) poll_state = 0;
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else poll_state = 1;
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break;
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case 1:
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if (byte != LE_EVENT_CODE) poll_state = 0;
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else poll_state = 2;
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break;
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case 2:
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if (byte > MAX_MSG_LEN) poll_state = 0;
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else {
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poll_state = 3;
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data_len = byte;
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}
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break;
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default:
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data_buf[poll_state - 3] = byte;
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if (poll_state == data_len + 3 - 1) {
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messages_received++;
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poll_state = 0;
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} else poll_state++;
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}
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}
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int hciCommand(unsigned short ogf, unsigned short ocf, unsigned char *data, unsigned char length)
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unsigned char *poll()
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{
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unsigned short opcode = ogf << 10 | ocf;
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unsigned char opcodebytes[2] = { lo(opcode), hi(opcode) };
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unsigned int goal = messages_received + 1;
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return hciCommandBytes(opcodebytes, data, length);
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}
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if (bt_isReadByteReady()) {
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unsigned int run = 0;
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void loadFirmware()
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{
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if (!hciCommand(OGF_VENDOR, VENDOR_LOAD_FIRMWARE, empty, 0)) uart_writeText("loadFirmware() failed\n");
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extern unsigned char _binary_BCM4345C0_hcd_start[];
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extern unsigned char _binary_BCM4345C0_hcd_size[];
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unsigned int c=0;
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unsigned int size = (long)&_binary_BCM4345C0_hcd_size;
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while (c < size) {
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unsigned char opcodebytes[] = { _binary_BCM4345C0_hcd_start[c], _binary_BCM4345C0_hcd_start[c+1] };
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unsigned char length = _binary_BCM4345C0_hcd_start[c+2];
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unsigned char *data = &(_binary_BCM4345C0_hcd_start[c+3]);
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if (!hciCommandBytes(opcodebytes, data, length)) {
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uart_writeText("Firmware data load failed\n");
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break;
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}
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c += 3 + length;
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while (run < MAX_READ_RUN && messages_received < goal && bt_isReadByteReady()) {
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unsigned char byte = bt_readByte();
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poll2(byte);
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run++;
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}
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if (run == MAX_READ_RUN) return 0;
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else return data_buf;
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}
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wait_msec(0x100000);
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return 0;
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}
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void setLEeventmask(unsigned char mask)
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void bt_update()
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{
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unsigned char params[] = { mask, 0, 0, 0, 0, 0, 0, 0 };
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if (!hciCommand(OGF_LE_CONTROL, 0x01, params, 8)) uart_writeText("setLEeventmask failed\n");
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}
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unsigned char *buf;
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void setLEscanenable(unsigned char state, unsigned char duplicates) {
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unsigned char params[] = { state, duplicates };
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if (!hciCommand(OGF_LE_CONTROL, 0x0c, params, 2)) uart_writeText("setLEscanenable failed\n");
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}
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while ( (buf = poll()) ) {
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if (data_len >= 2 && buf[0] == LE_ADREPORT_CODE) {
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unsigned char numreports = buf[1];
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void setLEscanparameters(unsigned char type, unsigned char linterval, unsigned char hinterval, unsigned char lwindow, unsigned char hwindow, unsigned char own_address_type, unsigned char filter_policy) {
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unsigned char params[] = { type, linterval, hinterval, lwindow, hwindow, own_address_type, filter_policy };
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if (!hciCommand(OGF_LE_CONTROL, 0x0b, params, 7)) uart_writeText("setLEscanparameters failed\n");
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}
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if (numreports == 1 && data_len >= 11) {
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uart_writeText("a(");
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for (int c=9;c>=4;c--) {
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if (c != 9) uart_writeText(":");
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uart_hex(buf[c]);
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}
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uart_writeText(")");
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void startActiveScanning() {
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float BleScanUnitsPerSecond = 1600;
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float BleScanInterval = 0.8;
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float BleScanWindow = 0.4;
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unsigned char buf_len = buf[10];
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unsigned int p = BleScanInterval * BleScanUnitsPerSecond;
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unsigned int q = BleScanWindow * BleScanUnitsPerSecond;
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if ((buf_len + 11) == data_len - 1) {
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buf += 11;
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unsigned char rssi = buf[buf_len];
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uart_writeText(" -> rssi("); uart_hex(rssi); uart_writeText(")");
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setLEscanparameters(LL_SCAN_ACTIVE, lo(p), hi(p), lo(q), hi(q), 0, 0);
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setLEscanenable(1, 0);
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unsigned char ad_len = buf[0];
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unsigned char ad_type = buf[1];
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buf += 2;
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uart_writeText(" -> adtype("); uart_hex(ad_type); uart_writeText(":"); uart_hex(ad_len); uart_writeText(")");
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if (ad_len > 2) {
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if (ad_type == 0xff) {
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uart_writeText(" -> "); uart_hex(buf[1] << 8); uart_writeText(":"); uart_hex(buf[0]); uart_writeText("\n");
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}
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}
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}
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uart_writeText("\r");
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}
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}
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}
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}
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void main()
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{
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fb_init();
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uart_init();
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bt_init();
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uart_writeText("reset()\n");
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if (!hciCommand(OGF_HOST_CONTROL, COMMAND_RESET_CHIP, empty, 0)) uart_writeText("reset() failed\n");
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uart_writeText("bt_reset()\n");
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bt_reset();
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uart_writeText("loadfirmware()\n");
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loadFirmware();
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uart_writeText("bt_loadfirmware()\n");
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bt_loadfirmware();
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setLEeventmask(0xff);
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startActiveScanning();
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uart_writeText("Waiting for input...\n");
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while (1) uart_update();
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while (1) {
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uart_update();
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bt_update();
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}
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}
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