void temperature_init()
{
spi_ss_off();
spi_ss_manual();
TEMP_SPI[SPI_CTRL] |= 16; //16 bit transfers
TEMP_SPI[SPI_CTRL] |= SPI_CTRL_TXNEG; //Transmit changes on negedge / Latch Pos edge
spi_setSpeed( 20 );
spi_ss_on();
spi_ss_auto();
//Calibrate CH1
spr_int_setmask(0x04);//Hackish, clean this up
spi_send(ADC_CONFIG | ADC_CAL | ADC_NUL); //Step 1/3
spr_int_clearflags(0x0);
while( spr_int_getflags() & 0x4 == 0 );
//for( int volatile i = 0; i < CONVTIME; ++i );
spi_send(ADC_CONFIG | ADC_CAL ); //Step 2/3
spr_int_clearflags(0x0);
while( spr_int_getflags() & 0x4 == 0 );
//for( int volatile i = 0; i < CONVTIME*20; ++i );
spi_send(ADC_CONFIG | ADC_NUL); //Step 3/3
spr_int_clearflags(0x0);
while( spr_int_getflags() & 0x4 == 0 );
//for( int volatile i = 0; i < CONVTIME; ++i );
spi_send(ADC_CONFIG); //Step 4/3
spr_int_clearflags(0x0);
while( spr_int_getflags() & 0x4 == 0 );
//for( int volatile i = 0; i < CONVTIME; ++i );
}
//! Initialise SPI
//!
//! @param default ctar0 value for SPI.CTAR0 register
//! @param default ctar1 value for SPI.CTAR1 register
//!
//! @note a default frequency is used.
//!
void spi_init(uint32_t ctar0, uint32_t ctar1) {
ctar0Value = ctar0;
ctar1Value = ctar1;
// Configure SPI
(void)spi_setSpeed(0);
SPI0->MCR = SPI_MCR_CLR_RXF_MASK|SPI_MCR_ROOE_MASK|SPI_MCR_CLR_TXF_MASK|SPI_MCR_PCSIS((1<<0)|(1<<1))|
SPI_MCR_MSTR_MASK|SPI_MCR_FRZ_MASK|SPI_MCR_DCONF(0)|SPI_MCR_SMPL_PT(0);
}
//! Initialises the CF BDM interface to default state (including speed)
//!
void bdmcf_init(void) {
DSI_OUT_PER = 1;
DSCLK_OUT_PER = 1;
#ifdef DSCLK_DRV_PER
DSCLK_DRV_PER = 1; // Holds DSCLK driver disabled when unused
#endif
BKPT_OUT_PER = 1; // Holds BKPT_OUT inactive when unused
#ifdef TA_OUT_PER
TA_OUT_PER = 1; // Holds TA_OUT inactive when unused
#endif
RESET_IN_PER = 1; // Needed for input level translation to 5V
RESET_OUT_PER = 1; // Holds RESET_OUT inactive when unused
#ifdef ALLPST_IN_PER
ALLPST_IN_PER = 1; // Needed for input level translation to 5V
#endif
#ifdef PST_IN_ENABLE
PST_IN_ENABLE(); // OSBDM boards
#endif
// Set up inputs
DSO_IN_DDR = 0;
RESET_IN_DDR = 0;
#ifdef ALLPST_IN_DDR
ALLPST_IN_DDR = 0;
#endif
DSCLK_DRV_ENABLE(); // DSCLK is driven
#ifdef SPI2C1
SPI2C1 = SPIxC1_OFF; // SPI2 is unused (Port pin is used for BKPT*)
#endif
(void)spi_setSpeed(0);
SPIxC2 = SPIxC2_16; // Initialise SPI1 but leave disabled
bdmcf_interfaceIdle();
#ifdef TCLK_CTL_DISABLE
TCLK_CTL_DISABLE();
#endif
}
//! Initialise SPI for SWD
//!
//! @return BDM_RC_OK => success
//!
uint8_t initDSPI_SWD(void) {
spi_configure(SPI_CTAR_LSBFE_MASK|SPI_CTAR_FMSZ(8-1), // 8-bit transfer
SPI_CTAR_LSBFE_MASK|SPI_CTAR_FMSZ(16-1)); // 16-bit transfer
return spi_setSpeed(0);
}
//! Set comm speed to user supplied value
//!
//! @note
//! commandBuffer\n
//! - [2..3] => speed in 'ticks'?
//!
//! @return
//! == \ref BDM_RC_OK => success \n
//! != \ref BDM_RC_OK => error
//!
uint8_t f_CMD_SPI_SET_SPEED(void) {
uint16_t freq = (commandBuffer[2]<<8)|commandBuffer[3]; // Get the new speed
return spi_setSpeed(freq);
}
