| /* ---------------------------------------------------------------------------- |
| * ATMEL Microcontroller Software Support |
| * ---------------------------------------------------------------------------- |
| * Copyright (c) 2009, Atmel Corporation |
| * |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are met: |
| * |
| * - Redistributions of source code must retain the above copyright notice, |
| * this list of conditions and the disclaimer below. |
| * |
| * Atmel's name may not be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE |
| * DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, |
| * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, |
| * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| * ---------------------------------------------------------------------------- |
| */ |
| |
| /*------------------------------------------------------------------------------ |
| * Headers |
| *------------------------------------------------------------------------------*/ |
| |
| #include "board.h" |
| |
| #include <string.h> |
| |
| volatile uint32_t char_stat; |
| |
| // FIXME: Remove: |
| #define PR TRACE_INFO |
| //#define PR printf |
| |
| volatile ringbuf sim_rcv_buf = { {0}, 0, 0 }; |
| |
| /** Initializes a ISO driver |
| */ |
| // FIXME: This function is implemented in iso7816_4.c !! Only MCK instead of SCK is always taken. Change that! |
| void _ISO7816_Init( void ) |
| { |
| printf("ISO_Init\n\r"); |
| TRACE_DEBUG("ISO_Init\n\r"); |
| |
| USART_Configure( USART_PHONE, |
| US_MR_USART_MODE_IS07816_T_0 |
| // Nope, we aren't master: |
| // | US_MR_USCLKS_MCK |
| | US_MR_USCLKS_SCK |
| | US_MR_NBSTOP_1_BIT |
| | US_MR_PAR_EVEN |
| | US_MR_CHRL_8_BIT |
| | US_MR_CLKO /** TODO: This field was set in the original simtrace firmware..why? */ |
| | (3<<24), /* MAX_ITERATION */ |
| 1, |
| 0); |
| /* |
| SYNC = 0 (async mode) |
| OVER = 0 (oversampling by 8?) |
| FIDI = 372 (default val on startup before other value is negotiated) |
| USCLKS = 3 (Select SCK as input clock) --> US_MR_USCLKS_SCK |
| CD = 1 ? --> US_BRGR_CD(1) |
| */ |
| USART_PHONE->US_FIDI = 372; |
| // USART_PHONE->US_IDR = (uint32_t) -1; |
| USART_PHONE->US_BRGR = US_BRGR_CD(1); |
| // USART_PHONE->US_BRGR = BOARD_MCK / (372*9600); |
| USART_PHONE->US_TTGR = 5; |
| |
| /* Configure USART */ |
| PMC_EnablePeripheral(ID_USART_PHONE); |
| |
| USART_PHONE->US_IDR = 0xffffffff; |
| USART_EnableIt( USART_PHONE, US_IER_RXRDY) ; |
| /* enable USART1 interrupt */ |
| NVIC_EnableIRQ( USART1_IRQn ) ; |
| |
| // USART_PHONE->US_IER = US_IER_RXRDY | US_IER_OVRE | US_IER_FRAME | US_IER_PARE | US_IER_NACK | US_IER_ITER; |
| } |
| |
| /* |
| * char_stat is zero if no error occured. |
| * Otherwise it is filled with the content of the status register. |
| */ |
| void USART1_IrqHandler( void ) |
| { |
| uint32_t stat; |
| char_stat = 0; |
| // Rcv buf full |
| /* if((stat & US_CSR_RXBUFF) == US_CSR_RXBUFF) { |
| TRACE_DEBUG("Rcv buf full"); |
| USART_DisableIt(USART1, US_IDR_RXBUFF); |
| } |
| */ |
| uint32_t csr = USART_PHONE->US_CSR; |
| |
| if (csr & US_CSR_TXRDY) { |
| /* transmit buffer empty, nothing to transmit */ |
| } |
| if (csr & US_CSR_RXRDY) { |
| stat = (csr&(US_CSR_OVRE|US_CSR_FRAME| |
| US_CSR_PARE|US_CSR_TIMEOUT|US_CSR_NACK| |
| (1<<10))); |
| uint8_t c = (USART_PHONE->US_RHR) & 0xFF; |
| // printf(" %x", c); |
| |
| if (stat == 0 ) { |
| /* Fill char into buffer */ |
| rbuf_write(&sim_rcv_buf, c); |
| } else { |
| rbuf_write(&sim_rcv_buf, c); |
| PR("e %x st: %x\n", c, stat); |
| } /* else: error occured */ |
| |
| char_stat = stat; |
| } |
| } |