stefank/rpi_pico_mfrc522
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WIP: Reuse logic from arduino project wo make mfrc522 work.

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Hint: https://github.com/miguelbalboa/rfid.git
This commit is contained in:
Stefan Kratochwil
2024-06-01 00:33:54 +02:00
parent 561b6d7ff7
commit 0fd71c101c
1 changed files with 92 additions and 2 deletions
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94
main.c
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@@ -59,17 +59,107 @@ void mfrc522_integration_init(void)
mfrc522_interface_debug_print("ERR: %s failed: %d\n", __FUNCTION__, init_retval);
}
// Set IRQ pin of MFRC522 to CMOS, enable irq on pico on success
uint8_t irq_pin_type_ret = mfrc522_set_interrupt_pin_type(&ctx, MFRC522_INTERRUPT_PIN_TYPE_STANDARD_CMOS);
if (irq_pin_type_ret != 0) {
mfrc522_interface_debug_print("ERR: Could not set interrupt pin type.");
mfrc522_interface_debug_print("ERR: Could not set interrupt pin type.\n");
}
else
{
mfrc522_integration_irq_init(&ctx);
}
// TODO Clear all interrupt bits here?
// Set rf uart to 106000 baud (tx/rx)
uint8_t set_tx_speed_ret = mfrc522_set_tx_speed(&ctx, MFRC522_SPEED_106_KBD);
if (set_tx_speed_ret != 0) {
mfrc522_interface_debug_print("ERR: could not set rf tx speed\n");
}
uint8_t set_rx_speed_ret = mfrc522_set_rx_speed(&ctx, MFRC522_SPEED_106_KBD);
if (set_rx_speed_ret != 0) {
mfrc522_interface_debug_print("ERR: could not set rf rx speed\n");
}
// Set modulation width to initial default value (datasheet section 9.3.3.4)
uint8_t set_modw_ret = mfrc522_set_modulation_width(&ctx, 0x26);
if (set_modw_ret != 0) {
mfrc522_interface_debug_print("ERR: could not set modulation width register\n");
}
// Timer setup. First set timer to auto, then set prescaler to 0xA9
uint8_t set_tauto_ret = mfrc522_set_timer_auto(&ctx, MFRC522_BOOL_TRUE);
if (set_tauto_ret != 0) {
mfrc522_interface_debug_print("ERR: Could not set timer to auto\n");
}
uint8_t set_tprescaler = mfrc522_set_timer_prescaler(&ctx, (uint16_t) 0xA9);
if (set_tprescaler != 0) {
mfrc522_interface_debug_print("ERR: Could not set timer prescaler\n");
}
// Timer setup. Configure reload registers (hi and lo)
uint8_t set_treload = mfrc522_set_timer_reload(&ctx, (uint16_t) 0x3E8);
if (set_treload != 0) {
mfrc522_interface_debug_print("ERR: Could not set timer reload value");
}
// A magic modulation setting: force ASK 100% - whatever that is..
uint8_t force_100ask_ret = mfrc522_set_force_100_ask(&ctx, MFRC522_BOOL_TRUE);
if (force_100ask_ret != 0) {
mfrc522_interface_debug_print("ERR: Could not force 100\% ASK modulation\n");
}
// More settings for the mode register (crc setup, wait for rf field)
uint8_t set_modereg_msbfirst_ret = mfrc522_set_crc_msb_first(&ctx, MFRC522_BOOL_FALSE);
if (set_modereg_msbfirst_ret != 0) {
mfrc522_interface_debug_print("ERR: Could not set crc to msb first\n");
}
uint8_t set_modereg_txwaitrf_ret = mfrc522_set_tx_wait_rf(&ctx, MFRC522_BOOL_TRUE);
if (set_modereg_txwaitrf_ret != 0) {
mfrc522_interface_debug_print("ERR: Could not make transmitter wait for rf field\n");
}
uint8_t set_modereg_polmfin_ret = mfrc522_set_mfin_polarity(&ctx, MFRC522_MFIN_POLARITY_HIGH);
if (set_modereg_polmfin_ret != 0)
{
mfrc522_interface_debug_print("ERR: Could not set mfin polarity\n");
}
uint8_t set_modereg_crcpres_ret = mfrc522_set_crc_preset(&ctx, MFRC522_CRC_PRESET_6363);
if (set_modereg_crcpres_ret != 0) {
mfrc522_interface_debug_print("ERR: Could not set crc preset value\n");
}
// Enable antenna
uint8_t set_ant_invrx2_ret = mfrc522_set_antenna_driver(&ctx, MFRC522_ANTENNA_DRIVER_INV_TX2_RF_ON, MFRC522_BOOL_TRUE);
if (set_ant_invrx2_ret != 0)
{
mfrc522_interface_debug_print("ERR: Could not enable tx2 invert\n");
}
uint8_t enable_ant_tx2rf_ret = mfrc522_set_antenna_driver(&ctx, MFRC522_ANTENNA_DRIVER_TX2_RF, MFRC522_BOOL_TRUE);
if (enable_ant_tx2rf_ret != 0)
{
mfrc522_interface_debug_print("ERR: Could not enable tx2 rf\n");
}
uint8_t enable_ant_tx1rf_ret = mfrc522_set_antenna_driver(&ctx, MFRC522_ANTENNA_DRIVER_TX1_RF, MFRC522_BOOL_TRUE);
if (enable_ant_tx1rf_ret != 0)
{
mfrc522_interface_debug_print("ERR: Could not enable tx1 rf\n");
}
// Enable RX interrupt on rf side XXX Are we doing the right thing?!?
uint8_t set_irq_invert_ret = mfrc522_set_interrupt1_pin_invert(&ctx, MFRC522_BOOL_TRUE);
if (set_irq_invert_ret != 0)
{
mfrc522_interface_debug_print("ERR: Could not invert irq pin\n");
}
// Enable RX interrupt
uint8_t en_rx_irq = mfrc522_set_interrupt1(&ctx, MFRC522_INTERRUPT1_RX , MFRC522_BOOL_TRUE);
if (en_rx_irq != 0)
{
mfrc522_interface_debug_print("ERR: Could not enable rx interrupt on rf side\n");
}
// Enable analog section of the reader
uint8_t analog_enable_retval = mfrc522_set_receiver_analog(&ctx, MFRC522_BOOL_TRUE);
if (analog_enable_retval != 0) {
mfrc522_interface_debug_print("ERR: Enabling analog receiver failed: %d\n", analog_enable_retval);