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fixed wakeup preamble, change PN532 chip to normal mode after wakeup

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This commit is contained in:
Roel Verdult 2010-07-28 12:52:39 +00:00
parent 9a7ffc38a1
commit 20ed5e1a52
1 changed files with 8 additions and 2 deletions
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10
libnfc/drivers/pn532_uart.c
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@ -286,14 +286,20 @@ bool pn532_uart_transceive(const nfc_device_spec_t nds, const byte_t* pbtTx, con
void
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. */
const byte_t pncmd_pn532c106_wakeup_preamble[] = { 0x55,0x55,0x00,0x00,0x00 };
/** After the preamble we request the PN532C106 chip to switch to "normal" mode (SAM is not used) */
const byte_t pncmd_pn532c106_wakeup_preamble[] = { 0x55,0x55,0x00,0x00,0x00,0x00,0x00,0xff,0x03,0xfd,0xd4,0x14,0x01,0x17,0x00,0x00,0xff,0x03,0xfd,0xd4,0x14,0x01,0x17,0x00 };
#ifdef DEBUG
PRINT_HEX("TX", pncmd_pn532c106_wakeup_preamble,sizeof(pncmd_pn532c106_wakeup_preamble));
#endif
uart_send((serial_port)nds, pncmd_pn532c106_wakeup_preamble, sizeof(pncmd_pn532c106_wakeup_preamble));
if(uart_receive((serial_port)nds,abtRx,&szRxLen)) {
#ifdef DEBUG
PRINT_HEX("RX", abtRx,szRxLen);
#endif
}
bool