//we will have to change if we abstract
void write_register(lcd_t *lcd, uint8_t byte, int rs, int rw)
{
gpio_set(lcd->rs, rs);
gpio_set(lcd->rw, rw);
//if (lcd->type == COM8BITS)
{
gpio_set(lcd->cs, 0);
ssp_write(lcd->ssp, byte);
gpio_set(lcd->cs, 1);
}
/* else
{
gpio_set(lcd->cs, 0);
ssp_write(lcd->ssp, byte);
gpio_set(lcd->cs, 1);
}*/
gpio_set(lcd->e, 0);
delay(lcd, 1);
gpio_set(lcd->e, 1);
delay(lcd, 1); //min: 300ns
gpio_set(lcd->e, 0);
delay(lcd, 80); //50us for most of operations
}
void __stack_smash_handler(char func[], int damaged)
{
static const char message[] = ": stack smashing attack in function ";
block_signals();
ssp_write(STDERR_FILENO, __uclibc_progname, message, func);
/* The loop is added only to keep gcc happy. */
while(1)
terminate();
}
void __stack_chk_fail(void)
{
static const char msg1[] = "stack smashing detected: ";
static const char msg3[] = " terminated";
block_signals();
ssp_write(STDERR_FILENO, msg1, __uclibc_progname, msg3);
/* The loop is added only to keep gcc happy. */
while(1)
terminate();
}
int main(void)
{
int i;
uint8_t ssp_val;
uint8_t serial_clock_rate;
uint8_t clock_prescale_rate;
gpio_setup();
/* Freq About 1.12MHz => Freq = PCLK / (CPSDVSR * [SCR+1]) with PCLK=PLL1=288MHz */
clock_prescale_rate = 2;
serial_clock_rate = 128;
ssp_init(SSP1_NUM,
SSP_DATA_8BITS,
SSP_FRAME_SPI,
SSP_CPOL_0_CPHA_0,
serial_clock_rate,
clock_prescale_rate,
SSP_MODE_NORMAL,
SSP_MASTER,
SSP_SLAVE_OUT_ENABLE);
ssp_val = 0x0;
while (1) {
ssp_write(SSP1_NUM, (uint16_t)ssp_val);
gpio_set(GPIO2, GPIOPIN1); /* LED on */
for (i = 0; i < 1000; i++) /* Wait a bit. */
__asm__("nop");
gpio_clear(GPIO2, GPIOPIN1); /* LED off */
ssp_val++;
}
return 0;
}
int spi_master_write(spi_t *obj, int value) {
ssp_write(obj, value);
return ssp_read(obj);
}
//FIX THAT
void delay(lcd_t *lcd, uint32_t t)
{
uint32_t i;
for (i = 0 ; i < t ; i++)
ssp_write(lcd->ssp, 0xff);
}
int spi_master_write(spi_t *obj, int value) {
ssp_write(obj, value);
while (obj->spi->SR & SSP_SR_BSY_Msk); /* Wait for send to finish */
return (ssp_read(obj));
}
