crewID/libnfc
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Add wake up function for PN532 UART and run a communication test to know if device correctly respond.

Browse source
This commit is contained in:
Romuald Conty 2010-04-12 14:48:03 +00:00
parent 1ba436041b
commit a4d1c53ed3
1 changed files with 34 additions and 17 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

51
libnfc/drivers/pn532_uart.c
View file

@ -61,6 +61,8 @@
#define SERIAL_DEFAULT_PORT_SPEED 115200
bool pn532_uart_wakeup(const nfc_device_spec_t nds);
nfc_device_desc_t *
pn532_uart_pick_device (void)
{
@ -117,6 +119,8 @@ pn532_uart_list_devices(nfc_device_desc_t pnddDevices[], size_t szDevices, size_
{
// Serial port claimed: a PN532_UART may be found...
// FIXME try to send a command to PN53x to know if you really have a PN53x connected here
if(!pn532_uart_wakeup((nfc_device_spec_t)sp)) continue;
uart_close(sp);
snprintf(pnddDevices[*pszDeviceFound].acDevice, DEVICE_NAME_LENGTH - 1, "%s (%s)", "PN532", acConnect);
pnddDevices[*pszDeviceFound].acDevice[DEVICE_NAME_LENGTH - 1] = '\0';
@ -142,12 +146,6 @@ pn532_uart_list_devices(nfc_device_desc_t pnddDevices[], size_t szDevices, size_
nfc_device_t* pn532_uart_connect(const nfc_device_desc_t* pndd)
{
/** @info PN532C106 wakeup. */
/** @todo Put this command in pn53x init process */
byte_t abtRxBuf[BUFFER_LENGTH];
size_t szRxBufLen;
const byte_t pncmd_pn532c106_wakeup[] = { 0x55,0x55,0x00,0x00,0x00,0x00,0x00,0xFF,0x03,0xFD,0xD4,0x14,0x01,0x17,0x00 };
serial_port sp;
nfc_device_t* pnd = NULL;
@ -164,17 +162,7 @@ nfc_device_t* pn532_uart_connect(const nfc_device_desc_t* pndd)
uart_set_speed(sp, pndd->uiSpeed);
}
uart_send(sp, pncmd_pn532c106_wakeup, sizeof(pncmd_pn532c106_wakeup));
if (!uart_receive(sp,abtRxBuf,&szRxBufLen)) {
ERR("%s", "Unable to receive data. (RX)");
return NULL;
}
#ifdef DEBUG
printf(" RX: ");
print_hex(abtRxBuf,szRxBufLen);
#endif
if(!pn532_uart_wakeup((nfc_device_spec_t)sp)) return NULL;
DBG("Successfully connected to: %s",pndd->pcPort);
@ -253,3 +241,32 @@ bool pn532_uart_transceive(const nfc_device_spec_t nds, const byte_t* pbtTx, con
return true;
}
bool
pn532_uart_wakeup(const nfc_device_spec_t nds)
{
byte_t abtRx[BUFFER_LENGTH];
size_t szRxLen;
/** PN532C106 wakeup. */
/** High Speed Unit (HSU) wake up consist to send 0x55 and wait a "long" delay for PN532 being wakeup. */
/** To be sure that PN532 is alive, we have put a "Diagnose" command to execute a "Communication Line Test" */
const byte_t pncmd_pn532c106_wakeup[] = { 0x55,0x55,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xD4,0x00,0x00,'l','i','b','n','f','c'};
uart_send((serial_port)nds, pncmd_pn532c106_wakeup, sizeof(pncmd_pn532c106_wakeup));
if (!uart_receive((serial_port)nds,abtRx,&szRxLen)) {
ERR("%s", "Unable to receive data. (RX)");
return false;
}
#ifdef DEBUG
printf(" RX: ");
print_hex(abtRx,szRxLen);
#endif
const byte_t attempted_result[] = { 0xD5,0x01,'l','i','b','n','f','c'};
if(0 != memcmp(abtRx,attempted_result,sizeof(attempted_result))) {
return false;
}
return true;
}