void rfid_init(void)
{
/* reset SSP peripheral */
LPC_SYSCON->PRESETCTRL = 0x01;
/* Enable SSP clock */
LPC_SYSCON->SYSAHBCLKCTRL |= (1 << 11);
// Enable SSP peripheral
LPC_IOCON->PIO0_8 = 0x01 | (0x01 << 3); /* MISO, Pulldown */
LPC_IOCON->PIO0_9 = 0x01; /* MOSI */
LPC_IOCON->SCKLOC = 0x00; /* route to PIO0_10 */
LPC_IOCON->JTAG_TCK_PIO0_10 = 0x02; /* SCK */
/* Set SSP clock to 4.5MHz */
LPC_SYSCON->SSPCLKDIV = 0x01;
LPC_SSP->CR0 = 0x0707;
LPC_SSP->CR1 = 0x0002;
LPC_SSP->CPSR = 0x02;
/* Initialize chip select line */
GPIOSetDir(PN532_CS_PORT, PN532_CS_PIN, 1);
rfid_cs(1);
/* Initialize RESET line */
GPIOSetDir(PN532_RESET_PORT, PN532_RESET_PIN, 1);
rfid_reset(0);
}
void rfid_init(void)
{
/* reset SSP peripheral */
LPC_SYSCON->PRESETCTRL = 0x01;
/* Enable SSP clock */
LPC_SYSCON->SYSAHBCLKCTRL |= (1 << 11);
// Enable SSP peripheral
LPC_IOCON->PIO0_8 = 0x01 | (0x01 << 3); /* MISO, Pulldown */
LPC_IOCON->PIO0_9 = 0x01; /* MOSI */
LPC_IOCON->SCKLOC = 0x00; /* route to PIO0_10 */
LPC_IOCON->JTAG_TCK_PIO0_10 = 0x02; /* SCK */
/* Set SSP clock to 4.5MHz */
LPC_SYSCON->SSPCLKDIV = 0x01;
LPC_SSP->CR0 = 0x0707;
LPC_SSP->CR1 = 0x0002;
LPC_SSP->CPSR = 0x02;
/* Initialize chip select line */
rfid_cs(1);
GPIOSetDir(PN532_CS_PORT, PN532_CS_PIN, 1);
/* Initialize RESET line */
rfid_reset(0);
GPIOSetDir(PN532_RESET_PORT, PN532_RESET_PIN, 1);
/* Create PN532 task */
xTaskCreate(rfid_task, (const signed char*) "RFID", TASK_RFID_STACK_SIZE,
NULL, TASK_RFID_PRIORITY, NULL);
}
static
void rfid_task(void *pvParameters)
{
int i;
static unsigned char data[80];
/* touch unused Parameter */
(void) pvParameters;
/* release reset line after 400ms */
vTaskDelay( 400 / portTICK_RATE_MS);
rfid_reset(1);
/* wait for PN532 to boot */
vTaskDelay( 100 / portTICK_RATE_MS);
/* read firmware revision */
debug_printf("\nreading firmware version...\n");
data[0] = PN532_CMD_GetFirmwareVersion;
rfid_execute(&data, 1, sizeof(data));
/* enable debug output */
debug_printf("\nenabling debug output...\n");
WriteRegister(0x6328, 0xFC);
// select test bus signal
WriteRegister(0x6321, 6);
// select test bus type
WriteRegister(0x6322, 0x07);
while (1)
{
/* wait 100ms */
vTaskDelay( 100 / portTICK_RATE_MS);
/* detect cards in field */
GPIOSetValue(LED_PORT, LED_BIT, LED_ON);
debug_printf("\nchecking for cards...\n");
data[0] = PN532_CMD_InListPassiveTarget;
data[1] = 0x01; /* MaxTg - maximum cards */
data[2] = 0x00; /* BrTy - 106 kbps type A */
if (((i = rfid_execute(&data, 3, sizeof(data))) >= 11) && (data[1]
== 0x01) && (data[2] == 0x01))
{
debug_printf("card id: ");
rfid_hexdump(&data[7], data[6]);
}
else
debug_printf("unknown response of %i bytes\n", i);
GPIOSetValue(LED_PORT, LED_BIT, LED_OFF);
/* turning field off */
debug_printf("\nturning field off again...\n");
data[0] = PN532_CMD_RFConfiguration;
data[1] = 0x01; /* CfgItem = 0x01 */
data[2] = 0x00; /* RF Field = off */
rfid_execute(&data, 3, sizeof(data));
}
}
static void
loop_rfid (void)
{
int res;
static unsigned char data[80];
/* release reset line after 400ms */
pmu_wait_ms (400);
rfid_reset (1);
/* wait for PN532 to boot */
pmu_wait_ms (100);
/* fully initialized */
GPIOSetValue (LED_PORT, LED_BIT, LED_ON);
/* read firmware revision */
debug_printf ("\nreading firmware version...\n");
data[0] = PN532_CMD_GetFirmwareVersion;
while ((res = rfid_execute (&data, 1, sizeof (data))) < 0)
{
debug_printf ("Reading Firmware Version Error [%i]\n", res);
pmu_wait_ms (450);
GPIOSetValue (LED_PORT, LED_BIT, LED_ON);
pmu_wait_ms (10);
GPIOSetValue (LED_PORT, LED_BIT, LED_OFF);
}
debug_printf ("PN532 Firmware Version: ");
if (data[1] != 0x32)
rfid_hexdump (&data[1], data[0]);
else
debug_printf ("v%i.%i\n", data[2], data[3]);
/* enable debug output */
debug_printf ("\nenabling debug output...\n");
rfid_write_register (0x6328, 0xFC);
// select test bus signal
rfid_write_register (0x6321, 6);
// select test bus type
rfid_write_register (0x6322, 0x07);
/* enable debug output */
GPIOSetValue (LED_PORT, LED_BIT, LED_ON);
while (1)
{
/* wait 10ms */
pmu_wait_ms (10);
/* detect cards in field */
data[0] = PN532_CMD_InListPassiveTarget;
data[1] = 0x01; /* MaxTg - maximum cards */
data[2] = 0x00; /* BrTy - 106 kbps type A */
if (((res = rfid_execute (&data, 3, sizeof (data))) >= 11) && (data[1]
== 0x01)
&& (data[2] == 0x01))
{
GPIOSetValue (LED_PORT, LED_BIT, LED_ON);
pmu_wait_ms (50);
GPIOSetValue (LED_PORT, LED_BIT, LED_OFF);
debug_printf ("card id: ");
rfid_hexdump (&data[7], data[6]);
}
else
{
GPIOSetValue (LED_PORT, LED_BIT, LED_ON);
if (res != -8)
debug_printf ("PN532 error res=%i\n", res);
}
/* turning field off */
data[0] = PN532_CMD_RFConfiguration;
data[1] = 0x01; /* CfgItem = 0x01 */
data[2] = 0x00; /* RF Field = off */
rfid_execute (&data, 3, sizeof (data));
}
}
