Christina Quast | c0aa769 | 2015-02-25 14:02:01 +0100 | [diff] [blame] | 1 | /* ---------------------------------------------------------------------------- |
| 2 | * ATMEL Microcontroller Software Support |
| 3 | * ---------------------------------------------------------------------------- |
| 4 | * Copyright (c) 2009, Atmel Corporation |
| 5 | * |
| 6 | * All rights reserved. |
| 7 | * |
| 8 | * Redistribution and use in source and binary forms, with or without |
| 9 | * modification, are permitted provided that the following conditions are met: |
| 10 | * |
| 11 | * - Redistributions of source code must retain the above copyright notice, |
| 12 | * this list of conditions and the disclaimer below. |
| 13 | * |
| 14 | * Atmel's name may not be used to endorse or promote products derived from |
| 15 | * this software without specific prior written permission. |
| 16 | * |
| 17 | * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR |
| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| 19 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE |
| 20 | * DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, |
| 23 | * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| 24 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| 25 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, |
| 26 | * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | * ---------------------------------------------------------------------------- |
| 28 | */ |
| 29 | |
| 30 | /*------------------------------------------------------------------------------ |
| 31 | * Headers |
| 32 | *------------------------------------------------------------------------------*/ |
| 33 | |
| 34 | #include "board.h" |
| 35 | |
| 36 | #include <string.h> |
| 37 | |
| 38 | extern uint8_t rcvdChar; |
| 39 | extern uint32_t char_stat; |
| 40 | |
Christina Quast | 4ba4d22 | 2015-03-02 16:14:09 +0100 | [diff] [blame] | 41 | //#define BUFLEN 14 |
| 42 | // FIXME: Remove: |
| 43 | #define PR TRACE_DEBUG |
| 44 | //#define PR printf |
| 45 | |
| 46 | /*typedef struct ring_buffer |
| 47 | { |
| 48 | uint8_t buf[BUFLEN*2]; // data buffer |
| 49 | uint8_t idx; // number of items in the buffer |
| 50 | } ring_buffer; |
| 51 | */ |
| 52 | ring_buffer buf = { {0}, 0 }; |
| 53 | |
| 54 | void buf_push(uint8_t item) |
| 55 | { |
| 56 | buf.buf[buf.idx % (BUFLEN*2)] = item; |
| 57 | PR("----- Push: %x %x\n\r", buf.idx, buf.buf[buf.idx]); |
| 58 | buf.idx = (buf.idx+1) % (BUFLEN*2); |
| 59 | } |
| 60 | |
| 61 | uint8_t get_buf_start(uint8_t *buf_start) |
| 62 | { |
| 63 | *buf_start = &(buf.buf[buf.idx]); |
| 64 | return 2*BUFLEN-buf.idx; |
| 65 | } |
| 66 | |
Christina Quast | c0aa769 | 2015-02-25 14:02:01 +0100 | [diff] [blame] | 67 | /** Initializes a ISO driver |
| 68 | */ |
| 69 | // FIXME: This function is implemented in iso7816_4.c !! Only MCK instead of SCK is always taken. Change that! |
| 70 | void _ISO7816_Init( void ) |
| 71 | { |
Christina Quast | 4ba4d22 | 2015-03-02 16:14:09 +0100 | [diff] [blame] | 72 | printf("ISO_Init\n\r"); |
Christina Quast | c0aa769 | 2015-02-25 14:02:01 +0100 | [diff] [blame] | 73 | TRACE_DEBUG("ISO_Init\n\r"); |
| 74 | |
| 75 | USART_Configure( USART_PHONE, |
| 76 | US_MR_USART_MODE_IS07816_T_0 |
| 77 | // Nope, we aren't master: |
| 78 | // | US_MR_USCLKS_MCK |
| 79 | | US_MR_USCLKS_SCK |
| 80 | | US_MR_NBSTOP_1_BIT |
| 81 | | US_MR_PAR_EVEN |
| 82 | | US_MR_CHRL_8_BIT |
| 83 | | US_MR_CLKO /** TODO: This field was set in the original simtrace firmware..why? */ |
| 84 | | (3<<24), /* MAX_ITERATION */ |
| 85 | 1, |
| 86 | 0); |
| 87 | /* |
| 88 | SYNC = 0 (async mode) |
| 89 | OVER = 0 (oversampling by 8?) |
| 90 | FIDI = 372 (default val on startup before other value is negotiated) |
| 91 | USCLKS = 3 (Select SCK as input clock) --> US_MR_USCLKS_SCK |
| 92 | CD = 1 ? --> US_BRGR_CD(1) |
| 93 | */ |
| 94 | USART_PHONE->US_FIDI = 372; |
| 95 | // USART_PHONE->US_IDR = (uint32_t) -1; |
| 96 | USART_PHONE->US_BRGR = US_BRGR_CD(1); |
| 97 | // USART_PHONE->US_BRGR = BOARD_MCK / (372*9600); |
| 98 | USART_PHONE->US_TTGR = 5; |
| 99 | |
| 100 | /* Configure USART */ |
| 101 | PMC_EnablePeripheral(ID_USART_PHONE); |
| 102 | |
| 103 | USART1->US_IDR = 0xffffffff; |
| 104 | USART_EnableIt( USART1, US_IER_RXRDY) ; |
| 105 | /* enable USART1 interrupt */ |
| 106 | NVIC_EnableIRQ( USART1_IRQn ) ; |
| 107 | |
| 108 | // USART_PHONE->US_IER = US_IER_RXRDY | US_IER_OVRE | US_IER_FRAME | US_IER_PARE | US_IER_NACK | US_IER_ITER; |
| 109 | } |
| 110 | |
| 111 | /* |
| 112 | * Initializes rcvdChar with the char received on USART interface |
| 113 | * char_stat is zero if no error occured. |
| 114 | * Otherwise it is filled with the content of the status register. |
| 115 | */ |
| 116 | void USART1_IrqHandler( void ) |
| 117 | { |
| 118 | uint32_t stat; |
| 119 | char_stat = 0; |
| 120 | // Rcv buf full |
| 121 | /* if((stat & US_CSR_RXBUFF) == US_CSR_RXBUFF) { |
| 122 | TRACE_DEBUG("Rcv buf full"); |
| 123 | USART_DisableIt(USART1, US_IDR_RXBUFF); |
| 124 | } |
| 125 | */ |
| 126 | uint32_t csr = USART_PHONE->US_CSR; |
| 127 | |
Christina Quast | 4ba4d22 | 2015-03-02 16:14:09 +0100 | [diff] [blame] | 128 | PR("---- stat: %x\n\r", csr); |
| 129 | |
Christina Quast | c0aa769 | 2015-02-25 14:02:01 +0100 | [diff] [blame] | 130 | if (csr & US_CSR_TXRDY) { |
| 131 | /* transmit buffer empty, nothing to transmit */ |
| 132 | } |
| 133 | if (csr & US_CSR_RXRDY) { |
| 134 | stat = (csr&(US_CSR_OVRE|US_CSR_FRAME| |
Christina Quast | 4ba4d22 | 2015-03-02 16:14:09 +0100 | [diff] [blame] | 135 | US_CSR_PARE|US_CSR_TIMEOUT|US_CSR_NACK| |
| 136 | (1<<10))); |
| 137 | |
Christina Quast | c0aa769 | 2015-02-25 14:02:01 +0100 | [diff] [blame] | 138 | if (stat == 0 ) { |
Christina Quast | 4ba4d22 | 2015-03-02 16:14:09 +0100 | [diff] [blame] | 139 | /* Fill char into buffer */ |
| 140 | PR("---- BUFLEN %x\n\r", buf.idx); |
| 141 | buf_push((USART_PHONE->US_RHR) & 0xFF); |
| 142 | } else { |
| 143 | // buf_push((USART_PHONE->US_RHR) & 0xFF); |
| 144 | PR("%x\n\r", (USART_PHONE->US_RHR) & 0xFF); |
| 145 | } /* else: error occured */ |
Christina Quast | c0aa769 | 2015-02-25 14:02:01 +0100 | [diff] [blame] | 146 | |
Christina Quast | 4ba4d22 | 2015-03-02 16:14:09 +0100 | [diff] [blame] | 147 | if ((buf.idx % BUFLEN) == 0) { |
| 148 | rcvdChar = 1; |
| 149 | } |
Christina Quast | c0aa769 | 2015-02-25 14:02:01 +0100 | [diff] [blame] | 150 | |
Christina Quast | 4ba4d22 | 2015-03-02 16:14:09 +0100 | [diff] [blame] | 151 | char_stat = stat; |
| 152 | } |
| 153 | } |