mirror of
https://github.com/isometimes/rpi4-osdev
synced 2024-09-19 21:32:58 +00:00
356 lines
10 KiB
C
356 lines
10 KiB
C
#include "io.h"
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#include "fb.h"
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// UART0
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enum {
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ARM_UART0_BASE = PERIPHERAL_BASE + 0x201000,
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ARM_UART0_DR = ARM_UART0_BASE + 0x00,
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ARM_UART0_FR = ARM_UART0_BASE + 0x18,
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ARM_UART0_IBRD = ARM_UART0_BASE + 0x24,
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ARM_UART0_FBRD = ARM_UART0_BASE + 0x28,
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ARM_UART0_LCRH = ARM_UART0_BASE + 0x2C,
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ARM_UART0_CR = ARM_UART0_BASE + 0x30,
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ARM_UART0_IFLS = ARM_UART0_BASE + 0x34,
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ARM_UART0_IMSC = ARM_UART0_BASE + 0x38,
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ARM_UART0_RIS = ARM_UART0_BASE + 0x3C,
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ARM_UART0_MIS = ARM_UART0_BASE + 0x40,
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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 = lo(mmio_read(ARM_UART0_DR));
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return ch;
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}
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unsigned char bt_waitReadByte()
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{
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while (!bt_isReadByteReady());
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return bt_readByte();
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}
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void bt_writeByte(char byte)
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{
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while ((mmio_read(ARM_UART0_FR) & 0x20) != 0);
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mmio_write(ARM_UART0_DR, (unsigned int)byte);
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}
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void bt_flushrx()
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{
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while (bt_isReadByteReady()) bt_readByte();
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}
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void bt_init()
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{
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gpio_useAsAlt3(30);
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gpio_useAsAlt3(31);
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gpio_useAsAlt3(32);
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gpio_useAsAlt3(33);
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bt_flushrx();
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mmio_write(ARM_UART0_IMSC, 0x00);
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mmio_write(ARM_UART0_ICR, 0x7ff);
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mmio_write(ARM_UART0_IBRD, 0x1a);
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mmio_write(ARM_UART0_FBRD, 0x03);
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mmio_write(ARM_UART0_IFLS, 0x08);
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mmio_write(ARM_UART0_LCRH, 0x70);
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mmio_write(ARM_UART0_CR, 0xB01);
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mmio_write(ARM_UART0_IMSC, 0x430);
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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_SET_BDADDR = 0x01,
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COMMAND_RESET_CHIP = 0x03,
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COMMAND_SET_BAUD = 0x18,
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COMMAND_LOAD_FIRMWARE = 0x2e,
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HCI_COMMAND_PKT = 0x01,
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HCI_ACL_PKT = 0x02,
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HCI_EVENT_PKT = 0x04,
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COMMAND_COMPLETE_CODE = 0x0e,
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CONNECT_COMPLETE_CODE = 0x0f,
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LL_SCAN_ACTIVE = 0x01,
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LL_ADV_NONCONN_IND = 0x03
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};
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int hciCommandBytes(unsigned char *opcodebytes, volatile 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 1;
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unsigned char code = bt_waitReadByte();
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if (code == CONNECT_COMPLETE_CODE) {
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if (bt_waitReadByte() != 4) return 2;
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unsigned char err = bt_waitReadByte();
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if (err != 0) {
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uart_writeText("Saw HCI COMMAND STATUS error "); uart_hex(err); uart_writeText("\n");
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return 12;
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}
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if (bt_waitReadByte() == 0) return 3;
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if (bt_waitReadByte() != opcodebytes[0]) return 4;
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if (bt_waitReadByte() != opcodebytes[1]) return 5;
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} else if (code == COMMAND_COMPLETE_CODE) {
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if (bt_waitReadByte() != 4) return 6;
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if (bt_waitReadByte() == 0) return 7;
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if (bt_waitReadByte() != opcodebytes[0]) return 8;
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if (bt_waitReadByte() != opcodebytes[1]) return 9;
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if (bt_waitReadByte() != 0) return 10;
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} else return 11;
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return 0;
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}
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int hciCommand(unsigned short ogf, unsigned short ocf, volatile 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_reset() {
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volatile unsigned char empty[] = {};
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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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void bt_loadfirmware()
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{
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volatile unsigned char empty[] = {};
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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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unsigned char opcodebytes[2];
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unsigned char length;
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unsigned char *data = &(_binary_BCM4345C0_hcd_start[0]);
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while (c < size) {
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opcodebytes[0] = *data;
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opcodebytes[1] = *(data+1);
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length = *(data+2);
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data += 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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data += length;
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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 bt_setbaud()
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{
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volatile unsigned char command[6] = { 0, 0, 0x00, 0xc2, 0x01, 0x00 }; // little endian, 115200
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if (hciCommand(OGF_VENDOR, COMMAND_SET_BAUD, command, 6)) uart_writeText("bt_setbaud() failed\n");
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}
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void bt_setbdaddr()
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{
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volatile unsigned char command[6] = { 0xee, 0xff, 0xc0, 0xee, 0xff, 0xc0 }; // reversed
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if (hciCommand(OGF_VENDOR, COMMAND_SET_BDADDR, command, 6)) uart_writeText("bt_setbdaddr() failed\n");
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}
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void bt_getbdaddr(unsigned char *bdaddr) {
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bt_writeByte(HCI_COMMAND_PKT);
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bt_writeByte(0x09);
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bt_writeByte(0x10);
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bt_writeByte(0x00);
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if (bt_waitReadByte() != HCI_EVENT_PKT) return;
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if (bt_waitReadByte() != COMMAND_COMPLETE_CODE) return;
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if (bt_waitReadByte() != 0x0a) return;
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if (bt_waitReadByte() != 1) return;
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if (bt_waitReadByte() != 0x09) return;
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if (bt_waitReadByte() != 0x10) return;
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if (bt_waitReadByte() != 0x00) return;
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for (int c=0;c<6;c++) bdaddr[c] = bt_waitReadByte();
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}
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void sendACLsubscribe(unsigned int handle)
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{
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bt_writeByte(HCI_ACL_PKT);
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bt_writeByte(lo(handle));
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bt_writeByte(hi(handle));
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unsigned int length = 0x0009;
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bt_writeByte(lo(length));
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bt_writeByte(hi(length));
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unsigned int data_length = 0x0005;
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bt_writeByte(lo(data_length));
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bt_writeByte(hi(data_length));
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unsigned int channel = 0x0004;
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bt_writeByte(lo(channel));
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bt_writeByte(hi(channel));
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volatile unsigned char command[5] = { 0x12, 0x2b, 0x00, 0x01, 0x00 };
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unsigned int c=0;
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while (c++<data_length) bt_writeByte(command[c-1]);
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}
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void setLEeventmask(unsigned char mask)
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{
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volatile unsigned char command[8] = { 0 };
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command[0] = mask;
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if (hciCommand(OGF_LE_CONTROL, 0x01, command, 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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volatile unsigned char command[2];
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command[0] = state;
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command[1] = duplicates;
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if (hciCommand(OGF_LE_CONTROL, 0x0c, command, 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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volatile unsigned char command[7];
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command[0] = type;
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command[1] = linterval;
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command[2] = hinterval;
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command[3] = lwindow;
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command[4] = hwindow;
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command[5] = own_address_type;
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command[6] = filter_policy;
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if (hciCommand(OGF_LE_CONTROL, 0x0b, command, 7)) uart_writeText("setLEscanparameters failed\n");
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}
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void setLEadvertenable(unsigned char state) {
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volatile unsigned char command[1];
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command[0] = state;
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if (hciCommand(OGF_LE_CONTROL, 0x0a, command, 1)) uart_writeText("setLEadvertenable failed\n");
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}
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void setLEadvertparameters(unsigned char type, unsigned char linterval_min, unsigned char hinterval_min, unsigned char linterval_max, unsigned char hinterval_max, unsigned char own_address_type, unsigned char filter_policy) {
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volatile unsigned char command[15] = { 0 };
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command[0] = linterval_min;
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command[1] = hinterval_min;
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command[2] = linterval_max;
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command[3] = hinterval_max;
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command[4] = type;
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command[5] = own_address_type;
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command[13] = 0x07;
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command[14] = filter_policy;
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if (hciCommand(OGF_LE_CONTROL, 0x06, command, 15)) uart_writeText("setLEadvertparameters failed\n");
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}
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void setLEadvertdata() {
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volatile unsigned char command[32] = {
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0x19,
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0x02, 0x01, 0x06,
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0x03, 0x03, 0xAA, 0xFE,
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0x11, 0x16, 0xAA, 0xFE, 0x10, 0x00, 0x03,
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0x69, 0x73, 0x6f, 0x6d, 0x65, 0x74, 0x69, 0x6d,
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0x2e, 0x65, 0x73,
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0, 0, 0, 0, 0, 0
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};
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if (hciCommand(OGF_LE_CONTROL, 0x08, command, 32)) uart_writeText("setLEadvertdata failed\n");
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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 stopAdvertising() {
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setLEadvertenable(0);
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}
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void startActiveScanning() {
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float BleScanInterval = 60; // every 60ms
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float BleScanWindow = 60;
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float BleScanDivisor = 0.625;
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unsigned int p = BleScanInterval / BleScanDivisor;
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unsigned int q = BleScanWindow / BleScanDivisor;
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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 startActiveAdvertising() {
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float advertMinFreq = 100; // every 100ms
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float advertMaxFreq = 100; // every 100ms
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float bleGranularity = 0.625;
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unsigned int min_interval = advertMinFreq / bleGranularity;
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unsigned int max_interval = advertMaxFreq / bleGranularity;
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setLEadvertparameters(LL_ADV_NONCONN_IND, lo(min_interval), hi(min_interval), lo(max_interval), hi(max_interval), 0, 0);
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setLEadvertdata();
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setLEadvertenable(1);
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}
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void connect(unsigned char *addr)
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{
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float BleScanInterval = 60; // every 60ms
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float BleScanWindow = 60;
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float BleScanDivisor = 0.625;
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float connMinFreq = 30; // every 30ms
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float connMaxFreq = 50; // every 50ms
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float BleGranularity = 1.25;
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unsigned int p = BleScanInterval / BleScanDivisor;
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unsigned int q = BleScanWindow / BleScanDivisor;
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unsigned int min_interval = connMinFreq / BleGranularity;
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unsigned int max_interval = connMaxFreq / BleGranularity;
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volatile unsigned char command[25] = { 0 };
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command[0] = lo(p);
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command[2] = lo(q);
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command[6] = *(addr+5);
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command[7] = *(addr+4);
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command[8] = *(addr+3);
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command[9] = *(addr+2);
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command[10] = *(addr+1);
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command[11] = *addr;
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command[13] = lo(min_interval);
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command[15] = lo(max_interval);
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command[19] = 0x2a;
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command[20] = 0x00;
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if (hciCommand(OGF_LE_CONTROL, 0x0d, command, 25)) uart_writeText("createLEconnection failed\n");
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}
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