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@racerxdl
Created April 13, 2017 03:08
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EFM8 C2 Write Port to Arduino
/**
Based on https://github.com/jaromir-sukuba/efm8prog/
Use his SW to program EFM8 using arduino.
This needs some work though (but it works)
**/
#define C2D 2
#define C2CK 3
#define LED 13
#define INBUSY 0x02
#define OUTREADY 0x01
void c2_send_bits (unsigned char data, unsigned char len);
void c2_pulse_clk (void);
unsigned char c2_read_bits (unsigned char len);
void c2_rst (void);
void c2_write_addr (unsigned char addr);
unsigned char c2_read_addr (void);
unsigned char c2_read_data (void);
void c2_write_data (unsigned char addr);
unsigned char c2_init_PI (void);
unsigned char c2_read_flash_block (unsigned int addr, unsigned char * data, unsigned char len);
unsigned char c2_poll_bit_low (unsigned char mask);
unsigned char c2_poll_bit_high (unsigned char mask);
unsigned char c2_write_flash_block (unsigned int addr, unsigned char * data, unsigned char len);
unsigned char c2_erase_device (void);
void c2_rst() {
digitalWrite(C2CK, LOW);
delayMicroseconds(100);
digitalWrite(C2CK, HIGH);
delayMicroseconds(100);
}
void c2_pulse_clk() {
pinMode(C2CK, OUTPUT);
digitalWrite(C2CK, LOW);
digitalWrite(C2CK, LOW);
digitalWrite(C2CK, LOW);
digitalWrite(C2CK, LOW);
digitalWrite(C2CK, HIGH);
}
unsigned char c2_read_bits (unsigned char len) {
unsigned char i, data, mask;
mask = 0x01 << (len-1);
data = 0;
pinMode(C2D, INPUT);
for (i=0;i<len;i++) {
c2_pulse_clk();
data = data >> 1;
if (digitalRead(C2D) == HIGH) {
data = data | mask;
}
}
pinMode(C2D, OUTPUT);
return data;
}
void c2_send_bits (unsigned char data, unsigned char len) {
unsigned char i;
pinMode(C2D, OUTPUT);
for (i=0;i<len;i++) {
if (data&0x01) {
digitalWrite(C2D, HIGH);
} else {
digitalWrite(C2D, LOW);
}
c2_pulse_clk();
data = data >> 1;
}
}
void c2_write_data (unsigned char data) {
unsigned char retval;
c2_send_bits(0x0, 1);
c2_send_bits(0x1, 2);
c2_send_bits(0x0, 2);
c2_send_bits(data, 8);
retval = 0;
while (retval == 0) {
retval = c2_read_bits(1);
}
c2_send_bits(0x0, 1);
}
unsigned char c2_poll_bit_high (unsigned char mask) {
unsigned char retval;
retval = c2_read_addr();
while ((retval&mask)==0) retval = c2_read_addr();
}
unsigned char c2_poll_bit_low (unsigned char mask) {
unsigned char retval;
retval = c2_read_addr();
while (retval&mask) retval = c2_read_addr();
}
unsigned char c2_read_flash_block (unsigned int addr, unsigned char * data, unsigned char len) {
unsigned char retval,i;
c2_write_addr(0xB4);
c2_write_data(0x06);
c2_poll_bit_low(INBUSY);
c2_poll_bit_high(OUTREADY);
retval = c2_read_data();
c2_write_data(addr>>8);
c2_poll_bit_low(INBUSY);
c2_write_data(addr&0xFF);
c2_poll_bit_low(INBUSY);
c2_write_data(len);
c2_poll_bit_low(INBUSY);
c2_poll_bit_high(OUTREADY);
retval = c2_read_data();
for (i=0;i<len;i++) {
c2_poll_bit_high(OUTREADY);
retval = c2_read_data();
data[i] = retval;
}
return i;
}
unsigned char c2_write_flash_block (unsigned int addr, unsigned char * data, unsigned char len) {
unsigned char retval,i;
c2_write_addr(0xB4);
c2_write_data(0x07);
c2_poll_bit_low(INBUSY);
c2_poll_bit_high(OUTREADY);
retval = c2_read_data();
c2_write_data(addr>>8);
c2_poll_bit_low(INBUSY);
c2_write_data(addr&0xFF);
c2_poll_bit_low(INBUSY);
c2_write_data(len);
c2_poll_bit_low(INBUSY);
c2_poll_bit_high(OUTREADY);
retval = c2_read_data();
for (i=0;i<len;i++) {
c2_write_data(data[i] );
c2_poll_bit_low(INBUSY);
}
c2_poll_bit_high(OUTREADY);
}
unsigned char c2_erase_device (void) {
unsigned char retval;
c2_write_addr(0xB4);
c2_write_data(0x03);
c2_poll_bit_low(INBUSY);
c2_poll_bit_high(OUTREADY);
retval = c2_read_data();
c2_write_data(0xDE);
c2_poll_bit_low(INBUSY);
c2_write_data(0xAD);
c2_poll_bit_low(INBUSY);
c2_write_data(0xA5);
c2_poll_bit_low(INBUSY);
c2_poll_bit_high(OUTREADY);
retval = c2_read_data();
}
unsigned char c2_init_PI (void) {
c2_rst();
c2_write_addr(0x02);
c2_write_data(0x02);
c2_write_data(0x04);
c2_write_data(0x01);
delay(20);
return 0;
}
unsigned char c2_read_data() {
unsigned char retval;
c2_send_bits(0x0, 1);
c2_send_bits(0x0, 2);
c2_send_bits(0x0, 2);
retval = 0;
while (retval == 0) {
retval = c2_read_bits(1);
}
retval = c2_read_bits(8);
c2_send_bits(0x0, 1);
return retval;
}
unsigned char c2_read_addr() {
unsigned char retval;
c2_send_bits(0x0, 1);
c2_send_bits(0x2, 2);
retval = c2_read_bits(8);
c2_send_bits(0x0, 1);
return retval;
}
void c2_write_addr(unsigned char addr) {
c2_send_bits(0x0,1);
c2_send_bits(0x3,2);
c2_send_bits(addr,8);
c2_send_bits(0x0,1);
}
void setup() {
Serial.begin(38400);
pinMode(C2CK, OUTPUT);
pinMode(C2D, OUTPUT);
digitalWrite(LED, LOW);
digitalWrite(C2CK, HIGH);
delay(300);
}
unsigned int i;
unsigned char retval;
unsigned char flash_array[34],flash_array2[34],flash_array3[34];
unsigned char rx_message[250],rx_message_ptr;
unsigned char rx,main_state,bytes_to_receive,rx_state;
unsigned char flash_buffer[130];
unsigned long addr;
unsigned char rx_state_machine (unsigned char state, unsigned char rx_char) {
if (state==0) {
rx_message_ptr = 0;
rx_message[rx_message_ptr++] = rx_char;
return 1;
}
if (state==1) {
bytes_to_receive = rx_char;
rx_message[rx_message_ptr++] = rx_char;
if (bytes_to_receive==0) return 3;
return 2;
}
if (state==2) {
rx_message[rx_message_ptr++] = rx_char;
bytes_to_receive--;
if (bytes_to_receive==0) return 3;
}
return state;
}
void loop() {
if (Serial.available()) {
rx = Serial.read();
rx_state = rx_state_machine(rx_state, rx);
if (rx_state == 3) {
switch (rx_message[0]) {
case 0x01:
c2_init_PI();
Serial.write(0x81);
digitalWrite(LED, HIGH);
rx_state = 0;
break;
case 0x02:
c2_rst();
Serial.write(0x82);
digitalWrite(LED, LOW);
rx_state = 0;
break;
case 0x03:
addr = (((unsigned long)(rx_message[3]))<<16) + (((unsigned long)(rx_message[4]))<<8) + (((unsigned long)(rx_message[5]))<<0);
for (i=0;i<rx_message[2];i++) {
flash_buffer[i] = rx_message[i+6];
}
c2_write_flash_block(addr,flash_buffer,rx_message[2]);
Serial.write(0x83);
rx_state = 0;
break;
case 0x04:
c2_erase_device();
Serial.write(0x84);
rx_state = 0;
break;
case 0x05:
Serial.write(0x85);
addr = (((unsigned long)(rx_message[3]))<<16) + (((unsigned long)(rx_message[4]))<<8) + (((unsigned long)(rx_message[5]))<<0);
c2_read_flash_block(addr,flash_buffer,rx_message[2]);
for (i=0;i<rx_message[2];i++) {
Serial.write(flash_buffer[i]);
}
rx_state = 0;
break;
case 0x06:
c2_write_addr(rx_message[3]);
c2_write_data(rx_message[4]);
Serial.write(0x86);
rx_state = 0;
break;
case 0x07:
c2_write_addr(rx_message[3]);
Serial.write(c2_read_data());
Serial.write(0x87);
rx_state = 0;
break;
}
}
}
}
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