void test_SPI_framework_2(void)
{
#if CDH_PROCESSOR_COMPILE
logLine("testing CDH SPI with framework (2)");
logLine(" transmitting: pwnage<-");
logLine(" with one TX");
Byte array[8] = {'p','w','n','a','g','e','<','-'};
SPI_transmitStream(&devices.COM_Processor, array, 8, true);
SPI_transmit(&devices.COM_Processor, '\r', true);
SPI_transmit(&devices.COM_Processor, '\n', true);
#else
logLine("testing COM SPI with framework (2)");
int i;
for (i = 0; i < 10; i++)
{
SPI_receive(&devices.CDH_Processor, true);
char received = devices.CDH_Processor.receiveMessage[0];
if (received != DUMMY_CHAR)
{
printf("%c", received);
}
}
printf("\r\nfinished receiving\r\n");
fflush(stdout);
#endif
}
/**
* \brief Funkcja zapisuje jednen bajt do danego rejestru RC522.
*
* \param uint8_t reg - adres rejestru do którego zapisujemy dane
* \param uint8_t data - dane do zapisu
* \returns Dane odczytane z RC522
*/
void RC522_write(uint8_t reg,uint8_t data)
{
SS_LOW;
SPI_transmit( (reg<<1)&0x7E );
SPI_transmit(data);
SS_HIGH;
}
//******************************************************************
//Function: to send a command to SD card
//Arguments: unsigned char (8-bit command value)
// & unsigned long (32-bit command argument)
//return: unsigned char; response byte
//******************************************************************
unsigned char SD_sendCommand(unsigned char cmd, unsigned long arg)
{
unsigned char response, retry=0;
SD_CS_ASSERT;
SPI_transmit(cmd | 0x40); //send command, first two bits always '01'
SPI_transmit(arg>>24);
SPI_transmit(arg>>16);
SPI_transmit(arg>>8);
SPI_transmit(arg);
SPI_transmit(0x95);
while((response = SPI_receive()) == 0xff) //wait response
if(retry++ > 0xfe) break; //time out error
SPI_receive(); //extra 8 CLK
SD_CS_DEASSERT;
return response; //return state
}
//******************************************************************
//Function: to initialize the SD card in SPI mode
//Arguments: none
//return: unsigned char; will be 0 if no error,
// otherwise the response byte will be sent
//******************************************************************
unsigned char SD_init(void)
{
unsigned char i, response, retry=0 ;
SD_CS_ASSERT;
do
{
for(i=0;i<10;i++)
SPI_transmit(0xff);
response = SD_sendCommand(GO_IDLE_STATE, 0);//send 'reset & go idle' command
retry++;
if(retry>0xfe) {transmitString_F(PSTR("SD init fail..")); return 1; }//time out
} while(response != 0x01);
SD_CS_DEASSERT;
SPI_transmit (0xff);
SPI_transmit (0xff);
retry = 0;
do
{
response = SD_sendCommand(SEND_OP_COND, 0); //activate card's initialization process
response = SD_sendCommand(SEND_OP_COND, 0); //resend command (for compatibility with some cards)
retry++;
if(retry>0xfe) return 1; //time out
}while(response);
SD_sendCommand(CRC_ON_OFF, OFF); //disable CRC; deafault - CRC disabled in SPI mode
SD_sendCommand(SET_BLOCK_LEN, 512); //set block size to 512
return 0; //normal return
}
void reset_incntr1(){
volatile U8 val;
incntr_SPI_mode();
incntr1_SS_low();
NOP();
SPI_transmit(0x98); //Select DTR for writing
val = HALF_INCNTR_VAL >> 16;
TWBR = val;
SPI_transmit(val);
val = HALF_INCNTR_VAL >> 8;
TWBR = val;
SPI_transmit(val);
val = HALF_INCNTR_VAL;
TWBR = val;
SPI_transmit(val);
NOP();
incntr1_SS_high();
NOP();
incntr1_SS_low();
NOP();
SPI_transmit(0xE0); //Load DTR to CNTR
NOP();
incntr1_SS_high();
}
void MCP2515_write(uint8_t data, uint8_t address)
{
SPI_enable();
SPI_transmit(MCP_WRITE);
SPI_transmit(address);
SPI_transmit(data);
SPI_disable();
}
//******************************************************************
//Function: to write to a single block of SD card
//Arguments: none
//return: unsigned char; will be 0 if no error,
// otherwise the response byte will be sent
//******************************************************************
unsigned char SD_writeSingleBlock(unsigned long startBlock) {
unsigned char response;
unsigned int i, retry=0;
response = SD_sendCommand(WRITE_SINGLE_BLOCK, startBlock<<9);
//write a Block command
if(response != 0x00) {
//check for SD status: 0x00 - OK (No flags set)
return response;
}
SD_CS_ASSERT;
SPI_transmit(0xfe); //Send start block token 0xfe (0x11111110)
for(i=0; i<512; i++) {
//send 512 bytes data
SPI_transmit(buffer[i]);
}
SPI_transmit(0xff); //transmit dummy CRC (16-bit), CRC is ignored here
SPI_transmit(0xff);
response = SPI_receive();
if( (response & 0x1f) != 0x05) {
//response= 0xXXX0AAA1 ; AAA='010' - data accepted
//AAA='101'-data rejected due to CRC error
SD_CS_DEASSERT;
//AAA='110'-data rejected due to write error
return response;
}
while(!SPI_receive()) {
//wait for SD card to complete writing and get idle
if(retry++ > 0xfffe) {
SD_CS_DEASSERT;
return 1;
}
}
SD_CS_DEASSERT;
SPI_transmit(0xff);
//just spend 8 clock cycle delay before reasserting the CS line
SD_CS_ASSERT;
//re-asserting the CS line to verify if card is still busy
while(!SPI_receive()) {
//wait for SD card to complete writing and get idle
if(retry++ > 0xfffe) {
SD_CS_DEASSERT;
return 1;
}
}
SD_CS_DEASSERT;
return 0;
}
uint8_t MCP2515_read(uint8_t address)
{
SPI_enable();
SPI_transmit(MCP_READ);
SPI_transmit(address);
uint8_t data = SPI_receive();
SPI_disable();
return data;
}
/**
* \brief Funkcja odczytuje jednen bajt z rejestru RC522.
*
* \param uint8_t reg - adres rejestru z którego odczytujemy dane
* \returns Dane odczytane z RC522
*/
uint8_t RC522_read(uint8_t reg)
{
uint8_t receive_data=0;
SS_LOW;
SPI_transmit(0x80 | ((reg<<1)&0x7E) );
receive_data=SPI_transmit(0x00);
SS_HIGH;
return receive_data;
}
void MCP2515_bit_modify(uint8_t address, uint8_t mask, uint8_t data)
{
SPI_enable();
SPI_transmit(MCP_BITMOD);
SPI_transmit(address);
SPI_transmit(mask);
SPI_transmit(data);
SPI_disable();
}
unsigned char SD_sendCommand(unsigned char cmd, unsigned long arg)
{
unsigned char response, retry=0, status;
//SD card accepts byte address while SDHC accepts block address in multiples of 512
//so, if it's SD card we need to convert block address into corresponding byte address by
//multipying it with 512. which is equivalent to shifting it left 9 times
//following 'if' loop does that
if(SDHC_flag == 0)
if(cmd == READ_SINGLE_BLOCK ||
cmd == READ_MULTIPLE_BLOCKS ||
cmd == WRITE_SINGLE_BLOCK ||
cmd == WRITE_MULTIPLE_BLOCKS ||
cmd == ERASE_BLOCK_START_ADDR||
cmd == ERASE_BLOCK_END_ADDR )
{
arg = arg << 9;
}
SD_CS_ASSERT;
SPI_transmit(cmd | 0x40); //send command, first two bits always '01'
SPI_transmit(arg>>24);
SPI_transmit(arg>>16);
SPI_transmit(arg>>8);
SPI_transmit(arg);
if(cmd == SEND_IF_COND) //it is compulsory to send correct CRC for CMD8 (CRC=0x87) & CMD0 (CRC=0x95)
SPI_transmit(0x87); //for remaining commands, CRC is ignored in SPI mode
else
SPI_transmit(0x95);
while((response = SPI_receive()) == 0xff) //wait response
if(retry++ > 0xfe) break; //time out error
if(response == 0x00 && cmd == 58) //checking response of CMD58
{
status = SPI_receive() & 0x40; //first byte of the OCR register (bit 31:24)
if(status == 0x40) SDHC_flag = 1; //we need it to verify SDHC card
else SDHC_flag = 0;
SPI_receive(); //remaining 3 bytes of the OCR register are ignored here
SPI_receive(); //one can use these bytes to check power supply limits of SD
SPI_receive();
}
SPI_receive(); //extra 8 CLK
SD_CS_DEASSERT;
return response; //return state
}
/***** updated the value of DA input register C with val *****/
void update_DA_C(U16 val){
U8 MSB;
U8 LSB;
DA_SPI_mode(); //Set the SPI module to be compatible with the DA
MSB = (U8)(val>>8);
LSB = (U8)val;
DA_SS_low();
SPI_transmit(0x80);
SPI_transmit(MSB);
SPI_transmit(LSB);
DA_SS_high();
DA_LOAD_low();
DA_LOAD_high();
}
void ant_v2x_periodic( void ) { /* Run initialisation and communication request */
switch (ant_v2x_status) {
case MAG_S_RESET:
SetBit(ANT_V2X_PORT, ANT_V2X_PIN);
ant_v2x_status = MAG_S_UNINIT;
break;
case MAG_S_UNINIT:
ant_v2x_periodic_initialise();
break;
case MAG_S_READY: /* Ready to receive request */
/*GREEN_LED_ON();*/
/*YELLOW_LED_OFF();*/
// if (ant_v2x_data_available) return
ant_v2x_send_get_data();
ant_v2x_status = MAG_S_WAIT_MEAS;
ant_v2x_periodic_count = 0;
break;
case MAG_S_WAIT_MEAS: { /* Waiting for measures */
ant_v2x_periodic_count++;
if (ant_v2x_periodic_count > 5) {
ant_v2x_com_status = MAG_CS_READING;
SPI_start();
ant_v2x_res_idx = 0;
ant_v2x_res_len = 43;
SPI_transmit(0x00);
}
}
break;
}
}
void MCP2515_rts(uint8_t rts_port)
{
SPI_enable();
switch (rts_port){
case 0:
SPI_transmit(MCP_RTS_TX0);
break;
case 1:
SPI_transmit(MCP_RTS_TX1);
break;
case 2:
SPI_transmit(MCP_RTS_TX2);
break;
}
SPI_disable();
}
/***** reads the counter standing of the third counter *****/
incval incntr3_get_value(){
volatile incval val;
incntr_SPI_mode(); // Set the SPI module to be compatible with the incremental counters
incntr3_SS_low();
NOP();
SPI_transmit(0x60);
val.MSB = SPI_transmit(0x00);
val.mid = SPI_transmit(0x00);
val.LSB = SPI_transmit(0x00);
NOP();
incntr3_SS_high();
return val;
}
void MCP2515_reset(void)
{
SPI_enable();
SPI_transmit(MCP_RESET);
SPI_disable();
//Allow mcp2515 time to complete command
_delay_us(1);
}
/********************************Request procedure***********************************/
void ant_v2x_send_req(const uint8_t* req, uint8_t len) {
memcpy(ant_v2x_req, req, len);
ant_v2x_req_len = len;
ant_v2x_req_idx = 0;
ant_v2x_com_status = MAG_CS_WRITING;
SPI_start();
SPI_transmit(SYNC_FLAG);/* transmit SYNC_FLAG first for every beginning of transmition */
}
unsigned char SD_writeSingleBlock(unsigned long startBlock)
{
unsigned char response;
unsigned int i, retry=0;
response = SD_sendCommand(WRITE_SINGLE_BLOCK, startBlock); /** block's writing command*/
if(response != 0x00) return response; /**check if SD status: 0x00 - OK (no flag activated)*/
SD_CS_ASSERT;
SPI_transmit(0xfe); /**send the 0xfe block (page 197 datasheet SD)*/
for(i=0; i<512; i++) /**send the 512 bytes data*/
SPI_transmit(buffer[i]);
SPI_transmit(0xff); //transmit dummy CRC (16-bit), CRC is ignored here
SPI_transmit(0xff);
response = SPI_receive();
if( (response & 0x1f) != 0x05) /**response= 0xXXX0AAA1 ; if: { AAA='010' - data accepted
AAA='101'-data rejected due to CRC error
AAA='110'-data rejected due to write error
}*/
{
SD_CS_DEASSERT;
return response;
}
while(!SPI_receive()) /**wait for SD card to complete the writing and go to get idle state*/
if(retry++ > 0xfffe){SD_CS_DEASSERT; return 1;} /**function output time-out*/
SD_CS_DEASSERT;
SPI_transmit(0xff); /**allow a 8 clock cycles delay before CS line reaffirming*/
SD_CS_ASSERT; /**CS line reaffirming to check if the card is still busy*/
while(!SPI_receive()) /**wait for SD card to complete the writing and go to get idle state*/
if(retry++ > 0xfffe){
SD_CS_DEASSERT; return 1;
}
SD_CS_DEASSERT;
return 0;
}
char MCP2515_read_status(void)
{
SPI_enable();
SPI_transmit(MCP_READ_STATUS);
uint8_t status = SPI_receive();
SPI_disable();
return status;
}
//******************************************************************
//Function: to send a command to SD card
//Arguments: unsigned char (8-bit command value)
// & unsigned long (32-bit command argument)
//return: unsigned char; response byte
//******************************************************************
unsigned char SD_sendCommand(unsigned char cmd, unsigned long arg)
{
unsigned char response, retry=0;
SD_CS_ASSERT;
/*TODO: add better checking of command */
SPI_transmit(cmd | 0x40); //send command, first two bits always '01'
SPI_transmit(arg>>24);
SPI_transmit(arg>>16);
SPI_transmit(arg>>8);
SPI_transmit(arg);
/* crc is ignored unless it's not enabled */
SPI_transmit(0x95);
while((response = SPI_receive()) == 0xff) //wait response
if(retry++ > 0xfe) break; //time out error
SPI_receive(); //extra 8 CLK
SD_CS_DEASSERT;
return response; //return state
}
void main()
{
//initialize button pins
ADCON1=0x07;
TRISB=0xFC;
TRISC=0x7F;
SPI_init(); //initialize MSSP for SPI comm
while(1)
{
button_press();
SPI_transmit(tx_data);
}
}
void reset_incntr3(){
U8 val;
incntr_SPI_mode();
incntr3_SS_low();
NOP();
SPI_transmit(0x98); //Select DTR for writing
val = HALF_INCNTR_VAL >> 16;
SPI_transmit(val);
val = HALF_INCNTR_VAL >> 8;
SPI_transmit(val);
val = HALF_INCNTR_VAL;
SPI_transmit(val);
NOP();
incntr3_SS_high();
incntr2_SS_low();
NOP();
SPI_transmit(0xE0); //Load DTR to CNTR
NOP();
incntr2_SS_high();
}
void test_SPI_framework(void)
{
#if CDH_PROCESSOR_COMPILE
logLine("testing CDH SPI with framework");
logLine(" transmitting: Kane is awesome **********");
SPI_transmit(&devices.COM_Processor, 'K', true);
SPI_transmit(&devices.COM_Processor, 'a', true);
SPI_transmit(&devices.COM_Processor, 'n', true);
SPI_transmit(&devices.COM_Processor, 'e', true);
SPI_transmit(&devices.COM_Processor, ' ', true);
SPI_transmit(&devices.COM_Processor, 'i', true);
SPI_transmit(&devices.COM_Processor, 's', true);
SPI_transmit(&devices.COM_Processor, ' ', true);
SPI_transmit(&devices.COM_Processor, 'a', true);
SPI_transmit(&devices.COM_Processor, 'w', true);
SPI_transmit(&devices.COM_Processor, 'e', true);
SPI_transmit(&devices.COM_Processor, 's', true);
SPI_transmit(&devices.COM_Processor, 'o', true);
SPI_transmit(&devices.COM_Processor, 'm', true);
SPI_transmit(&devices.COM_Processor, 'e', true);
SPI_transmit(&devices.COM_Processor, ' ', true);
int i;
for (i = 0; i < 10; i++)
{
SPI_transmit(&devices.COM_Processor, '*', true);
}
SPI_transmit(&devices.COM_Processor, '\r', true);
SPI_transmit(&devices.COM_Processor, '\n', true);
#else
logLine("testing COM SPI with framework");
int i;
for (i = 0; i < 28; i++)
{
SPI_receive(&devices.CDH_Processor, true);
char received = devices.CDH_Processor.receiveMessage[0];
if (received != DUMMY_CHAR)
{
printf("%c", received);
}
}
printf("\r\nfinished receiving\r\n");
fflush(stdout);
#endif
}
unsigned char SPI_receive(void)
{
return SPI_transmit(0xff);
}
/*
* fct_SDCard.c
*
* Created on: 21 juin 2016
* Author: formateur
*/
#include <avr/io.h>
#include <util/delay.h>
#include "../lib/usart.h"
#include "../lib/fct_spi.h"
#include "../lib/fct_SDCard.h"
//******************************************************************
//Function : to initialize the SD/SDHC card in SPI mode
//Arguments : none
//return : unsigned char; will be 0 if no error,
// otherwise the response byte will be sent
//******************************************************************
unsigned char SD_init(void)
{
unsigned char response, SD_version;
unsigned int retry=0 ;
int i=0;
//Spi init
spi_init(); /**send init on spi peripheral**/
for(i=0;i<10;i++){
SD_CS_ASSERT; /**set chip select*/
do
{
response = SD_sendCommand(GO_IDLE_STATE, 0); /**send software reset */
retry++;
if(retry>0x20){
//
USART0_print("\rpas de carte\n");
//
return 1; /**time out, card not detected*/
}
} while(response != 0x01); /**response= 0x01 : card in idle state and no error*/
SD_CS_DEASSERT;
SPI_transmit (0xff); /**1st byte transmission */
SPI_transmit (0xff); /**2nd byte transmission */
retry = 0; /**reset retries counter*/
SD_version = 2; //default set to SD compliance with ver2.x;
//this may change after checking the next command
do
{
response = SD_sendCommand(SEND_IF_COND,0x000001AA); /**check power supply status,for SDHC card*/
retry++;
if(retry>0xfe)
{
SD_version = 1;
cardType = 1;
break;
} //time out
}while(response != 0x01);
retry = 0;
do
{
response = SD_sendCommand(APP_CMD,0); //CMD55, must be sent before sending any ACMD command
response = SD_sendCommand(SD_SEND_OP_COND,0x40000000); //ACMD41
retry++;
if(retry>0xfe)
{
USART0_print("\rinitialisation a échoué\n");
return 2; //time out, card initialization failed
}
}while(response != 0x00);
retry = 0;
SDHC_flag = 0;
if (SD_version == 2)
{
do
{
response = SD_sendCommand(READ_OCR,0);
retry++;
if(retry>0xfe)
{
cardType = 0;
break;
} //time out
}while(response != 0x00);
if(SDHC_flag == 1) cardType = 2;
else cardType = 3;
}
//SD_sendCommand(CRC_ON_OFF, OFF); //disable CRC; deafault - CRC disabled in SPI mode
//SD_sendCommand(SET_BLOCK_LEN, 512); //set block size to 512; default size is 512
//
switch (cardType) /** switch for card type (to check communication with the card)*/
{
case 1 : USART0_print("\rver1.x\n");break;
case 2 : USART0_print("\rSDHC\n");break;
case 3 : USART0_print("\rver2.x\n");break;
default : USART0_print("runknown Sd card\n");
}
//
return 0;break; /**successful return*/
}
_delay_ms(1); /**give some time to end the init*/
return 0;
}
//******************************************************************
//Function : to send a command to SD card
//Arguments : unsigned char (8-bit command value)
// & unsigned long (32-bit command argument)
//return : unsigned char; response byte
//******************************************************************
unsigned char SD_sendCommand(unsigned char cmd, unsigned long arg)
{
unsigned char response, retry=0, status;
//SD card accepts byte address while SDHC accepts block address in multiples of 512
//so, if it's SD card we need to convert block address into corresponding byte address by
//multipying it with 512. which is equivalent to shifting it left 9 times
//following 'if' loop does that
if(SDHC_flag == 0)
if(cmd == READ_SINGLE_BLOCK ||
cmd == READ_MULTIPLE_BLOCKS ||
cmd == WRITE_SINGLE_BLOCK ||
cmd == WRITE_MULTIPLE_BLOCKS ||
cmd == ERASE_BLOCK_START_ADDR||
cmd == ERASE_BLOCK_END_ADDR )
{
arg = arg << 9;
}
SD_CS_ASSERT;
SPI_transmit(cmd | 0x40); //send command, first two bits always '01'
SPI_transmit(arg>>24);
SPI_transmit(arg>>16);
SPI_transmit(arg>>8);
SPI_transmit(arg);
if(cmd == SEND_IF_COND) //it is compulsory to send correct CRC for CMD8 (CRC=0x87) & CMD0 (CRC=0x95)
SPI_transmit(0x87); //for remaining commands, CRC is ignored in SPI mode
else
SPI_transmit(0x95);
while((response = SPI_receive()) == 0xff) //wait response
if(retry++ > 0xfe) break; //time out error
if(response == 0x00 && cmd == 58) //checking response of CMD58
{
status = SPI_receive() & 0x40; //first byte of the OCR register (bit 31:24)
if(status == 0x40) SDHC_flag = 1; //we need it to verify SDHC card
else SDHC_flag = 0;
SPI_receive(); //remaining 3 bytes of the OCR register are ignored here
SPI_receive(); //one can use these bytes to check power supply limits of SD
SPI_receive();
}
SPI_receive(); //extra 8 CLK
SD_CS_DEASSERT;
return response; //return state
}
//*****************************************************************
//Function : to erase specified no. of blocks of SD card
//Arguments : none
//return : unsigned char; will be 0 if no error,
// otherwise the response byte will be sent
//*****************************************************************
unsigned char SD_erase (unsigned long startBlock, unsigned long totalBlocks)
{
unsigned char response;
response = SD_sendCommand(ERASE_BLOCK_START_ADDR, startBlock); /**send address of starting block*/
if(response != 0x00) /**check the SD status: 0x00 - OK (No flags set)*/
return response;
response = SD_sendCommand(ERASE_BLOCK_END_ADDR,(startBlock + totalBlocks - 1)); /**send adress of end block*/
if(response != 0x00) /**check the SD status: 0x00 - OK (No flags set)*/
return response;
response = SD_sendCommand(ERASE_SELECTED_BLOCKS, 0); /**erase all selected blocks*/
if(response != 0x00) /**check SD status: 0x00 - OK (No flags set)*/
return response;
return 0; //normal return
}
//******************************************************************
//Function : to read a single block from SD card
//Arguments : none
//return : unsigned char; will be 0 if no error,
// otherwise the response byte will be sent
//******************************************************************
unsigned char SD_readSingleBlock(unsigned long startBlock)
{
unsigned char response;
unsigned int i, retry=0;
response = SD_sendCommand(READ_SINGLE_BLOCK, startBlock); /**read a Block command*/
if(response != 0x00) return response; /**check if SD status: 0x00 - OK (no flag activated)*/
SD_CS_ASSERT;
retry = 0;
while(SPI_receive() != 0xfe) /**wait for start block to get the 0xfe value*/
if(retry++ > 0xfffe){
SD_CS_DEASSERT;
return 1; } /**function output time-out*/
for(i=0; i<512; i++) /**read every 512 bytes*/
buffer[i] = SPI_receive();
SPI_receive(); /**let 8 clock pulses*/
SD_CS_DEASSERT;
return 0;
}
//******************************************************************
//Function : to write to a single block of SD card
//return : unsigned char; will be 0 if no error,
// otherwise the response byte will be sent
//******************************************************************
unsigned char SD_writeSingleBlock(unsigned long startBlock)
{
unsigned char response;
unsigned int i, retry=0;
response = SD_sendCommand(WRITE_SINGLE_BLOCK, startBlock); /** block's writing command*/
if(response != 0x00) return response; /**check if SD status: 0x00 - OK (no flag activated)*/
SD_CS_ASSERT;
SPI_transmit(0xfe); /**send the 0xfe block (page 197 datasheet SD)*/
for(i=0; i<512; i++) /**send the 512 bytes data*/
SPI_transmit(buffer[i]);
SPI_transmit(0xff); //transmit dummy CRC (16-bit), CRC is ignored here
SPI_transmit(0xff);
response = SPI_receive();
if( (response & 0x1f) != 0x05) /**response= 0xXXX0AAA1 ; if: { AAA='010' - data accepted
AAA='101'-data rejected due to CRC error
AAA='110'-data rejected due to write error
}*/
{
SD_CS_DEASSERT;
return response;
}
while(!SPI_receive()) /**wait for SD card to complete the writing and go to get idle state*/
if(retry++ > 0xfffe){SD_CS_DEASSERT; return 1;} /**function output time-out*/
SD_CS_DEASSERT;
SPI_transmit(0xff); /**allow a 8 clock cycles delay before CS line reaffirming*/
SD_CS_ASSERT; /**CS line reaffirming to check if the card is still busy*/
while(!SPI_receive()) /**wait for SD card to complete the writing and go to get idle state*/
if(retry++ > 0xfffe){
SD_CS_DEASSERT; return 1;
}
SD_CS_DEASSERT;
return 0;
}
#ifndef FAT_TESTING_ONLY
//***************************************************************************/
//Function : to read multiple blocks from SD card & send every block to UART
//Arguments : none
//return : unsigned char; will be 0 if no error,
// otherwise the response byte will be sent
//****************************************************************************/
unsigned char SD_readMultipleBlock (unsigned long startBlock, unsigned long totalBlocks)
{
unsigned char response;
unsigned int i, retry=0;
retry = 0;
response = SD_sendCommand(READ_MULTIPLE_BLOCKS, startBlock); //write a Block command
if(response != 0x00) return response; //check for SD status: 0x00 - OK (No flags set)
SD_CS_ASSERT;
while( totalBlocks )
{
retry = 0;
while(SPI_receive() != 0xfe) //wait for start block token 0xfe (0x11111110)
if(retry++ > 0xfffe){SD_CS_DEASSERT; return 1;} //return if time-out
for(i=0; i<512; i++) //read 512 bytes
buffer[i] = SPI_receive();
SPI_receive(); //receive incoming CRC (16-bit), CRC is ignored here
SPI_receive();
SPI_receive(); //extra 8 cycles
TX_NEWLINE;
transmitString_F(PSTR(" --------- "));
TX_NEWLINE;
for(i=0; i<512; i++) //send the block to UART
{
if(buffer[i] == '~') break;
transmitByte ( buffer[i] );
}
TX_NEWLINE;
transmitString_F(PSTR(" --------- "));
TX_NEWLINE;
totalBlocks--;
}
SD_sendCommand(STOP_TRANSMISSION, 0); //command to stop transmission
SD_CS_DEASSERT;
SPI_receive(); //extra 8 clock pulses
return 0;
}
//***************************************************************************/
//Function: to receive data from UART and write to multiple blocks of SD card
//Arguments: none
//return: unsigned char; will be 0 if no error,
// otherwise the response byte will be sent
//****************************************************************************/
unsigned char SD_writeMultipleBlock(unsigned long startBlock, unsigned long totalBlocks)
{
unsigned char response, data;
unsigned int i, retry=0;
unsigned long blockCounter=0, size;
response = SD_sendCommand(WRITE_MULTIPLE_BLOCKS, startBlock); //write a Block command
if(response != 0x00) return response; //check for SD status: 0x00 - OK (No flags set)
SD_CS_ASSERT;
TX_NEWLINE;
transmitString_F(PSTR(" Enter text (End with ~): "));
TX_NEWLINE;
while( blockCounter < totalBlocks )
{//e. Cette librairie est dépendante de la librairie SPI. Voici le code à m
i=0;
do
{
data = receiveByte();
if(data == 0x08) //'Back Space' key pressed
{
if(i != 0)
{
transmitByte(data);
transmitByte(' ');
transmitByte(data);
i--;
size--;
}
continue;
}
transmitByte(data);
buffer[i++] = data;
if(data == 0x0d)
{
transmitByte(0x0a);
buffer[i++] = 0x0a;
}
if(i == 512) break;
}while (data != '~');
TX_NEWLINE;
transmitString_F(PSTR(" ---- "));
TX_NEWLINE;
SPI_transmit(0xfc); //Send start block token 0xfc (0x11111100)
for(i=0; i<512; i++) //send 512 bytes data
SPI_transmit( buffer[i] );
SPI_transmit(0xff); //transmit dummy CRC (16-bit), CRC is ignored here
SPI_transmit(0xff);
response = SPI_receive();
if( (response & 0x1f) != 0x05) //response= 0xXXX0AAA1 ; AAA='010' - data accepted
{ //AAA='101'-data rejected due to CRC error
SD_CS_DEASSERT; //AAA='110'-data rejected due to write error
return response;
}
while(!SPI_receive()) //wait for SD card to complete writing and get idle
if(retry++ > 0xfffe){SD_CS_DEASSERT; return 1;}
SPI_receive(); //extra 8 bits
blockCounter++;
}
SPI_transmit(0xfd); //send 'stop transmission token'
retry = 0;
if(data == '~')
{
fileSize--; //to remove the last entered '~' character
i--;
for(;i<512;i++) //fill the rest of the buffer with 0x00
buffer[i]= 0x00;
error = SD_writeSingleBlock (startBlock);
txString(_COM1, "data = ~\n");
break;
}
while(!SPI_receive()) //wait for SD card to complete writing and get idle
if(retry++ > 0xfffe){SD_CS_DEASSERT; return 1;}
SD_CS_DEASSERT;
SPI_transmit(0xff); //just spend 8 clock cycle delay before reasserting the CS signal
SD_CS_ASSERT; //re assertion of the CS signal is required to verify if card is still busy
while(!SPI_receive()) //wait for SD card to complete writing and get idle
if(retry++ > 0xfffe){SD_CS_DEASSERT; return 1;}
SD_CS_DEASSERT;
return 0;
}
void MCP_reset(){
toggle_cs(0); //CS low
SPI_transmit(MCP_RESET); // sen reset command 0b11000000
toggle_cs(1); //CS high
}
//******************************************************************
//Function : to initialize the SD/SDHC card in SPI mode
//Arguments : none
//return : unsigned char; will be 0 if no error,
// otherwise the response byte will be sent
//******************************************************************
unsigned char SD_init(void)
{
unsigned char response, SD_version;
unsigned int retry=0 ;
int i=0;
//Spi init
spi_init(); /**send init on spi peripheral**/
for(i=0;i<10;i++){
SD_CS_ASSERT; /**set chip select*/
do
{
response = SD_sendCommand(GO_IDLE_STATE, 0); /**send software reset */
retry++;
if(retry>0x20){
//
USART0_print("\rpas de carte\n");
//
return 1; /**time out, card not detected*/
}
} while(response != 0x01); /**response= 0x01 : card in idle state and no error*/
SD_CS_DEASSERT;
SPI_transmit (0xff); /**1st byte transmission */
SPI_transmit (0xff); /**2nd byte transmission */
retry = 0; /**reset retries counter*/
SD_version = 2; //default set to SD compliance with ver2.x;
//this may change after checking the next command
do
{
response = SD_sendCommand(SEND_IF_COND,0x000001AA); /**check power supply status,for SDHC card*/
retry++;
if(retry>0xfe)
{
SD_version = 1;
cardType = 1;
break;
} //time out
}while(response != 0x01);
retry = 0;
do
{
response = SD_sendCommand(APP_CMD,0); //CMD55, must be sent before sending any ACMD command
response = SD_sendCommand(SD_SEND_OP_COND,0x40000000); //ACMD41
retry++;
if(retry>0xfe)
{
USART0_print("\rinitialisation a échoué\n");
return 2; //time out, card initialization failed
}
}while(response != 0x00);
retry = 0;
SDHC_flag = 0;
if (SD_version == 2)
{
do
{
response = SD_sendCommand(READ_OCR,0);
retry++;
if(retry>0xfe)
{
cardType = 0;
break;
} //time out
}while(response != 0x00);
if(SDHC_flag == 1) cardType = 2;
else cardType = 3;
}
//SD_sendCommand(CRC_ON_OFF, OFF); //disable CRC; deafault - CRC disabled in SPI mode
//SD_sendCommand(SET_BLOCK_LEN, 512); //set block size to 512; default size is 512
//
switch (cardType) /** switch for card type (to check communication with the card)*/
{
case 1 : USART0_print("\rver1.x\n");break;
case 2 : USART0_print("\rSDHC\n");break;
case 3 : USART0_print("\rver2.x\n");break;
default : USART0_print("runknown Sd card\n");
}
//
return 0;break; /**successful return*/
}
_delay_ms(1); /**give some time to end the init*/
return 0;
}
//******************************************************************
//Function : to initialize the SD/SDHC card in SPI mode
//Arguments : none
//return : unsigned char; will be 0 if no error,
// otherwise the response byte will be sent
//******************************************************************
unsigned char SD_init(void)
{
unsigned char i, response, SD_version;
unsigned int retry=0 ;
for(i=0;i<10;i++)
SPI_transmit(0xff); //80 clock pulses spent before sending the first command
SD_CS_ASSERT;
do
{
response = SD_sendCommand(GO_IDLE_STATE, 0); //send 'reset & go idle' command
retry++;
if(retry>0x20)
return 1; //time out, card not detected
} while(response != 0x01);
SD_CS_DEASSERT;
SPI_transmit (0xff);
SPI_transmit (0xff);
retry = 0;
SD_version = 2; //default set to SD compliance with ver2.x;
//this may change after checking the next command
do
{
response = SD_sendCommand(SEND_IF_COND,0x000001AA); //Check power supply status, mendatory for SDHC card
retry++;
if(retry>0xfe)
{
TX_NEWLINE;
SD_version = 1;
cardType = 1;
break;
} //time out
}while(response != 0x01);
retry = 0;
do
{
response = SD_sendCommand(APP_CMD,0); //CMD55, must be sent before sending any ACMD command
response = SD_sendCommand(SD_SEND_OP_COND,0x40000000); //ACMD41
retry++;
if(retry>0xfe)
{
TX_NEWLINE;
return 2; //time out, card initialization failed
}
}while(response != 0x00);
retry = 0;
SDHC_flag = 0;
if (SD_version == 2)
{
do
{
response = SD_sendCommand(READ_OCR,0);
retry++;
if(retry>0xfe)
{
TX_NEWLINE;
cardType = 0;
break;
} //time out
}while(response != 0x00);
if(SDHC_flag == 1) cardType = 2;
else cardType = 3;
}
//SD_sendCommand(CRC_ON_OFF, OFF); //disable CRC; deafault - CRC disabled in SPI mode
//SD_sendCommand(SET_BLOCK_LEN, 512); //set block size to 512; default size is 512
return 0; //successful return
}
/***** initalises the three incremental counters *****/
void incntr_init(){
incntr2_SS_high();
incntr3_SS_high();
incntr_SPI_mode(); // Set the SPI module to be compatible with the incremental counters
DA_SS_high();
DA_LOAD_high();
DA_LOAD_low();
DA_DARST_high();
DA_DARST_low();
incntr1_SS_high();
NOP();
//TWBR = SPI_transmit(0x88);
incntr1_SS_low();
NOP();
SPI_transmit(0x88); //select MDR0 for writing
SPI_transmit(0x73); //sets counter to 4x count, free running, index loads output
//for debugging
/* incntr1_SS_high();
NOP();
incntr1_SS_low();
NOP();
SPI_transmit(0x48); //select MDR0 for reading
SPI_transmit(0x00); //dummy transmission to read
//end of debugging
*/
NOP();
incntr1_SS_high();
NOP();
incntr1_SS_low();
NOP();
SPI_transmit(0x90); //selects MDR1 for writing
SPI_transmit(0xB1); //LFLAG and DFLAG are set on carry or borrow, 3 byte counter mode
NOP();
incntr1_SS_high();
NOP();
incntr2_SS_high();
NOP();
incntr2_SS_low();
NOP();
SPI_transmit(0x88); //select MDR0 for writing
SPI_transmit(0x73); //sets counter to 4x count, free running, index loads output
NOP();
incntr2_SS_high();
NOP();
incntr2_SS_low();
NOP();
SPI_transmit(0x90); //selects MDR1 for writing
SPI_transmit(0xB1); //LFLAG and DFLAG are set on carry or borrow, 2 byte counter mode
NOP();
incntr2_SS_high();
NOP();
incntr3_SS_high();
NOP();
incntr3_SS_low();
NOP();
SPI_transmit(0x88); //select MDR0 for writing
SPI_transmit(0x73); //sets counter to 4x count, free running, index loads output
NOP();
incntr3_SS_high();
NOP();
incntr3_SS_low();
NOP();
SPI_transmit(0x90); //selects MDR1 for writing
SPI_transmit(0xB1); //LFLAG and DFLAG are set on carry or borrow, 2 byte counter mode
NOP();
incntr3_SS_high();
NOP();
}
