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// Sample main.cpp file. Blinks the built-in LED, sends a message out
// USART2, and turns on PWM on pin 2.
#include "wirish.h"
#include "i2c.h"
static const uint8 slave_address = 0b1010001;
#define NR_ELEMENTS 64
uint8 buf0[NR_ELEMENTS + 2] = {0x0, 0x0};
uint8 buf1[] = {0x0, 0x0};
uint8 buf2[NR_ELEMENTS];
void setup() {
i2c_msg msgs[3];
uint32 i;
pinMode(BOARD_LED_PIN, OUTPUT);
i2c_master_enable(I2C1, 0);
for (i = 0; i < sizeof buf0; i++) {
buf0[i + 2] = i & 0xFF;
}
#if 0
/* Write some bytes */
msgs[0].addr = slave_address;
msgs[0].flags = 0;
msgs[0].length = sizeof buf0;
msgs[0].data = buf0;
i2c_master_xfer(I2C1, msgs, 1);
delay(5);
return;
#endif
msgs[1].addr = slave_address;
msgs[1].flags = 0;
msgs[1].length = sizeof buf1;
msgs[1].data = buf1;
msgs[2].addr = slave_address;
msgs[2].flags = I2C_MSG_READ;
msgs[2].length = sizeof buf2;
msgs[2].data = buf2;
i2c_master_xfer(I2C1, msgs + 1, 2);
#if 0
for (i = 0; i < 256; i++) {
/* Read it back */
buf1[1] = i;
msgs[1].addr = slave_address;
msgs[1].flags = 0;
msgs[1].length = 2;
msgs[1].data = buf1;
msgs[2].addr = slave_address;
msgs[2].flags = I2C_MSG_READ;
msgs[2].length = 1;
msgs[2].data = buf2;
i2c_master_xfer(I2C1, msgs + 1, 2);
delay(10);
}
#endif
}
void loop() {
toggleLED();
delay(100);
}
// Force init to be called *first*, i.e. before static object allocation.
// Otherwise, statically allocated object that need libmaple may fail.
__attribute__(( constructor )) void premain() {
init();
}
int main(void) {
setup();
while (1) {
loop();
}
return 0;
}
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