mirror of
https://github.com/isometimes/rpi4-osdev
synced 2024-11-12 13:20:39 +00:00
122 lines
3.7 KiB
C
122 lines
3.7 KiB
C
#include "io.h"
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#include "fb.h"
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#include "bt.h"
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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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};
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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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{
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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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}
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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 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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}
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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 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("loadfirmware()\n");
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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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}
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