/*============================================================================
Name : BitBangSPI_Send_Byte
------------------------------------------------------------------------------
Purpose : Send and Read one byte using BitBangSPI Interface
Input : Data to send to slave
Output : Data read from slave
Notes : Called from BitBangSPI_Send_Message in this file
============================================================================*/
uint8_t BitBangSPI_Send_Byte(uint8_t c)
{
unsigned bit;
for (bit = 0; bit < 8; bit++) {
/* write MOSI on trailing edge of previous clock */
if (c & 0x80)
REG( PORT, SPI_BB_MOSI )->OVRS = ( 1 << MOSI_BB );
else
REG( PORT, SPI_BB_MOSI )->OVRC = ( 1 << MOSI_BB );
c <<= 1;
/* half a clock cycle before leading/rising edge */
cpu_delay_us(3u, F_CPU); /* SHOULD BE ~3uS. */
REG( PORT, SPI_BB_SCK )->OVRS = ( 1 << SCK_BB );
/* half a clock cycle before trailing/falling edge */
cpu_delay_us(3u, F_CPU); /* SHOULD BE ~3uS. */
/* read MISO on trailing edge */
c |= ((REG( PORT, SPI_BB_MISO )->PVR >> MISO_BB) & 0x01);
REG( PORT, SPI_BB_SCK )->OVRC = ( 1 << SCK_BB );
}
REG( PORT, SPI_BB_MOSI )->OVRC = ( 1 << MOSI_BB );
cpu_delay_us(18u, F_CPU);/* SHOULD BE ~18uS. */
return c;
}
void LEDPWM()
{
LED_Init();
LED_Off(LED0|LED1|LED2|LED3);
unsigned int counter = 0;
LED_On(LED0);
while (1)
{
if (counter == 0)
LED_On(LED1|LED2|LED3);
if (counter == 3)
LED_Off(LED1);
if (counter == 2)
LED_Off(LED2);
if (counter == 1)
LED_Off(LED3);
counter = (counter + 1) % 4;
cpu_delay_us(500, FOSCRC);
}
}
void LEDPulsating()
{
LED_Init();
LED_Off(LED0|LED1|LED2|LED3);
unsigned int counter = 0;
unsigned int div = 8;
unsigned int cycle = 0, ccycle = 0;
unsigned int cycle_counter = 0;
while (1)
{
if (cycle)
{
if (counter == 0)
LED_On(LED0|LED1|LED2|LED3);
else if (counter == cycle)
LED_Off(LED0|LED1|LED2|LED3);
}
counter = (counter + 1) % div;
cycle_counter = (cycle_counter + 1) % (256/div);
if (!cycle_counter)
{
ccycle = (ccycle + 1) % (2*div);
if (ccycle < div)
cycle = ccycle;
else
cycle = 2*div - 1 - ccycle;
}
cpu_delay_us(2000/div, FOSCRC);
}
}
/*! \brief Read device register content.
*
* \param reg_index Register address.
* \returns Register content.
*/
uint8_t at42qt1060_read_reg(uint8_t reg_index)
{
uint8_t data;
twi_package_t twi_package;
twi_package.chip = AT42QT1060_TWI_ADDRESS;
twi_package.addr_length = 0;
twi_package.buffer = ®_index;
twi_package.length = 1;
while(twi_master_write(AT42QT1060_TWI, &twi_package)!=TWI_SUCCESS);
/* We need a delay here to make this work although this is not
* specified in the datasheet.
* Also there seems to be a bug in the TWI module or the driver
* since some delay here (code or real delay) adds about 500us
* between the write and the next read cycle.
*/
cpu_delay_us(20, cpu_hz);
twi_package.chip = AT42QT1060_TWI_ADDRESS;
twi_package.addr_length = 0;
twi_package.buffer = &data;
twi_package.length = 1;
while(twi_master_read(AT42QT1060_TWI, &twi_package)!=TWI_SUCCESS);
return data;
}
/*============================================================================
* Name : BitBangSPI_Send_Byte
* ------------------------------------------------------------------------------
* Purpose : Send and Read one byte using BitBangSPI Interface
* Input : Data to send to slave
* Output : Data read from slave
* Notes : Called from BitBangSPI_Send_Message in this file
* ============================================================================*/
uint8_t BitBangSPI_Send_Byte(uint8_t c)
{
uint32_t bit;
bool i;
for (bit = 0u; bit < 8u; bit++) {
/* write MOSI on trailing edge of previous clock */
if (c & 0x80u) {
port_pin_set_output_level(CONCAT(PIN_P, SPI_BB_MOSI,
MOSI_BB), 1u);
} else {
port_pin_set_output_level(CONCAT(PIN_P, SPI_BB_MOSI,
MOSI_BB), 0u);
}
c <<= 1u;
/* half a clock cycle before leading/rising edge */
cpu_delay_us(1u); /* SHOULD BE ~3uS. */
port_pin_set_output_level(CONCAT(PIN_P, SPI_BB_SCK, SCK_BB), 1u);
/* half a clock cycle before trailing/falling edge */
cpu_delay_us(1u); /* SHOULD BE ~3uS. */
/* read MISO on trailing edge */
i = (port_pin_get_input_level(CONCAT(PIN_P, SPI_BB_MISO, MISO_BB)));
if (i == true) {
c |= (0x01u);
} else {
}
port_pin_set_output_level(CONCAT(PIN_P, SPI_BB_SCK, SCK_BB), 0u);
}
port_pin_set_output_level(CONCAT(PIN_P, SPI_BB_MOSI, MOSI_BB), 0u);
cpu_delay_us(50u); /* SHOULD BE ~18uS. */
return c;
}
//the main function
int main(void) {
//change the clock to osc0 = 12MHz
AVR32_PM.oscctrl0 = AVR32_PM_OSCCTRL0_MODE_CRYSTAL_G3<<AVR32_PM_OSCCTRL0_MODE_OFFSET | 3<<AVR32_PM_OSCCTRL0_STARTUP_OFFSET;
AVR32_PM.mcctrl |= AVR32_PM_MCCTRL_OSC0EN_MASK;
while (!(AVR32_PM.poscsr & AVR32_PM_POSCSR_OSC0RDY_MASK));
AVR32_PM.mcctrl |= AVR32_PM_MCCTRL_MCSEL_OSC0;
LED_Init();
Switch_Init();
LED_Off(LED0|LED1|LED2|LED3);
unsigned int counter = 0;
unsigned int div = 32;
unsigned int cycle = 0, ccycle = 0;
unsigned int cycle_counter = 0;
while (1)
{
if (cycle)
{
if (counter == 0)
LED_On(LED0|LED1|LED2|LED3);
else if (counter == cycle)
LED_Off(LED0|LED1|LED2|LED3);
}
counter = (counter + 1) % div;
cycle_counter = (cycle_counter + 1) % (2048/div);
if (!cycle_counter)
{
ccycle = (ccycle + 1) % (2*div);
if (ccycle < div)
cycle = ccycle;
else
cycle = 2*div - 1 - ccycle;
}
cpu_delay_us(2000/div, FOSC0);
}
return 0;
}
int main(void) {
// Switch the main clock to the external oscillator 0
pm_switch_to_osc0(&AVR32_PM, FOSC0, OSC0_STARTUP);
board_init();
Switch_Init();
LED_Off(LED0|LED1|LED2|LED3);
unsigned int counter = 0;
unsigned int div = 32;
unsigned int cycle = 0, ccycle = 0;
unsigned int cycle_counter = 0;
while (1)
{
if (cycle)
{
if (counter == 0)
LED_On(LED0|LED1|LED2|LED3);
else if (counter == cycle)
LED_Off(LED0|LED1|LED2|LED3);
}
counter = (counter + 1) % div;
cycle_counter = (cycle_counter + 1) % (2048/div);
if (!cycle_counter)
{
ccycle = (ccycle + 1) % (2*div);
if (ccycle < div)
cycle = ccycle;
else
cycle = 2*div - 1 - ccycle;
}
cpu_delay_us(2000/div, FOSC0);
}
return 0;
}
void delay_us(unsigned long delay)
{
cpu_delay_us(delay, s_fcpu_hz);
}
void usb_suspend_action(void)
{
#if (UC3A || UC3B)
volatile avr32_pm_t *pm = &AVR32_PM;
unsigned long clock;
unsigned long cksel_save;
U32 startup;
pm->AWEN.usb_waken = 1;
// Save the clock source, Clock Select (CKSEL) and startup time since we will reconfigure them
clock = pm_get_clock(&AVR32_PM);
startup = AVR32_PM.OSCCTRL0.startup;
pm_cksel_get(&AVR32_PM, &cksel_save);
// Setup a long startup time. We will control it with a software delay.
// Moreover, this also ensures that the PLL0 will not be blocked due to a
// bad oscillator state/frequency in the case of a short startup (0 or 1.1 ms).
AVR32_PM.OSCCTRL0.startup = AVR32_PM_OSCCTRL0_STARTUP_2048_RCOSC;
// Switch on the internal RC oscillator
pm_switch_to_clock(&AVR32_PM, AVR32_PM_MCSEL_SLOW);
// Reset the Clock Select in order to ensure we are running on
// the internal RC osc at full speed.
pm_cksel(&AVR32_PM
, 0, 0 // PBA
, 0, 0 // PBB
, 0, 0 // HSB
);
// If there is a chance that any PB write operations are incomplete, the CPU
// should perform a read operation from any register on the PB bus before
// executing the sleep instruction.
AVR32_INTC.ipr[0]; // Dummy read
// Entering into Sleep mode.
SLEEP(AVR32_PM_SMODE_STATIC);
// Exit from Sleep mode.
// The host may start using the USB 10 ms (FS) or 3 ms (HS) after the RESUME.
// Waits for oscillator startup with a time lower than USB requirements.
cpu_delay_us(1400, AVR32_PM_RCOSC_FREQUENCY);
// Restore CKSEL
pm_cksel_set(&AVR32_PM, cksel_save);
// Shorten the startup time, since OSC0 is ready.
AVR32_PM.OSCCTRL0.startup = AVR32_PM_OSCCTRL0_STARTUP_0_RCOSC;
// Switch back to the previous clock.
pm_switch_to_clock(&AVR32_PM, clock);
// Restore startup time
AVR32_PM.OSCCTRL0.startup = startup;
pm->AWEN.usb_waken = 0;
#else
Enable_global_interrupt();
//! @todo Implement this on the silicon version
//Enter_power_down_mode(); // For example...
#if 0
pm->AWEN.usb_waken = 1;
// If there is a chance that any PB write operations are incomplete, the CPU
// should perform a read operation from any register on the PB bus before
// executing the sleep instruction.
AVR32_INTC.ipr[0]; // Dummy read
// Entering into Sleep mode.
SLEEP(AVR32_PM_SMODE_STATIC);
// Exit from Sleep mode.
pm->AWEN.usb_waken = 0;
#endif
#endif
}
void delay_us(unsigned long delay,unsigned long fcpu_hz)
{
cpu_delay_us(delay, fcpu_hz);
}
/*
* @brief spi_txrx SPI transmit and receive the data
*
* @param bufTx Transmit Buffer
* @param lenbufTx Length of transmit buffer
* @param returnType
* @param bufRx SPI Rx Buffer
* @param Max Length of Rx Buffer size
* @param isFirst
* @param isLast
*
*/
void spi_txrx(uint8_t* bufTx,
uint8_t lenbufTx,
spi_return_t returnType,
uint8_t* bufRx,
uint8_t maxLenBufRx,
spi_first_t isFirst,
spi_last_t isLast)
{
uint8_t spi_byte;
#ifdef SPI_IN_INTERRUPT_MODE
/* Disable the interrupts */
cpu_irq_disable();
#endif
/* register spi frame to send */
spi_vars.pNextTxByte = bufTx;
spi_vars.numTxedBytes = 0;
spi_vars.txBytesLeft = lenbufTx;
spi_vars.returnType = returnType;
spi_vars.pNextRxByte = bufRx;
spi_vars.maxRxBytes = maxLenBufRx;
spi_vars.isFirst = isFirst;
spi_vars.isLast = isLast;
/* SPI is now busy */
spi_vars.busy = 1;
/* lower CS signal to have slave listening */
if (spi_vars.isFirst==SPI_FIRST) {
/* Start SPI transaction by pulling SEL low */
port_pin_set_level(AT86RFX_SPI_CS, SET_LOW);
cpu_delay_us(10);
}
#ifdef SPI_IN_INTERRUPT_MODE
/* implementation 1. use a callback function when transaction finishes */
/* Send the Read command byte */
spi_write_buffer_wait(&master, spi_vars.pNextTxByte, 1);
/* re-enable interrupts */
cpu_irq_enable();
#else
/* implementation 2. busy wait for each byte to be sent */
/* send all bytes */
while (spi_vars.txBytesLeft > 0)
{
/* write next byte to TX buffer */
/* Send the Read command byte */
spi_byte = *spi_vars.pNextTxByte;
spi_txrx_data(&spi_byte);
/* save the byte just received in the RX buffer */
switch (spi_vars.returnType) {
case SPI_FIRSTBYTE:
if (spi_vars.numTxedBytes==0) {
*spi_vars.pNextRxByte = spi_byte;
}
break;
case SPI_BUFFER:
*spi_vars.pNextRxByte = spi_byte;
spi_vars.pNextRxByte++;
break;
case SPI_LASTBYTE:
*spi_vars.pNextRxByte = spi_byte;
break;
}
/* one byte less to go */
spi_vars.pNextTxByte++;
spi_vars.numTxedBytes++;
spi_vars.txBytesLeft--;
}
/* put CS signal high to signal end of transmission to slave */
if (spi_vars.isLast==SPI_LAST)
{
/* Stop the SPI transaction by setting SEL high */
port_pin_set_level(AT86RFX_SPI_CS, SET_HIGH);
}
/* SPI is not busy anymore */
spi_vars.busy = 0;
#endif
}
