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49 lines
1.2 KiB
49 lines
1.2 KiB
static int elm327_tx_hook(CAN_FIFOMailBox_TypeDef *to_send) {
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int tx = 1;
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int bus = GET_BUS(to_send);
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int addr = GET_ADDR(to_send);
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int len = GET_LEN(to_send);
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//All ELM traffic must appear on CAN0
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if (bus != 0) {
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tx = 0;
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}
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//All ISO 15765-4 messages must be 8 bytes long
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if (len != 8) {
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tx = 0;
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}
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//Check valid 29 bit send addresses for ISO 15765-4
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//Check valid 11 bit send addresses for ISO 15765-4
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if ((addr != 0x18DB33F1) && ((addr & 0x1FFF00FF) != 0x18DA00F1) &&
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((addr != 0x7DF) && ((addr & 0x7F8) != 0x7E0))) {
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tx = 0;
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}
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return tx;
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}
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static int elm327_tx_lin_hook(int lin_num, uint8_t *data, int len) {
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int tx = 1;
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if (lin_num != 0) {
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tx = 0; //Only operate on LIN 0, aka serial 2
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}
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if ((len < 5) || (len > 11)) {
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tx = 0; //Valid KWP size
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}
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if (!(((data[0] & 0xF8U) == 0xC0U) && ((data[0] & 0x07U) != 0U) &&
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(data[1] == 0x33U) && (data[2] == 0xF1U))) {
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tx = 0; //Bad msg
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}
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return tx;
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}
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const safety_hooks elm327_hooks = {
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.init = nooutput_init,
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.rx = default_rx_hook,
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.tx = elm327_tx_hook,
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.tx_lin = elm327_tx_lin_hook,
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.ignition = default_ign_hook,
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.fwd = default_fwd_hook,
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};
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