// well the spi has to be setup. enough said
inline void configSPI1() {
SPI1CON1 = SEC_PRESCAL_4_1 | // 4:1 prescale = 60MHz / 4 = 15MHz
PRI_PRESCAL_1_1 |
CLK_POL_ACTIVE_HIGH | //clock active high (CKP = 0)
SPI_CKE_ON | //out changes inactive to active (CKE=0)
SPI_MODE16_ON | //16-bit mode
MASTER_ENABLE_ON; //master mode
CONFIG_SDO1_TO_RP(RD4_RP); //use RD4 for SDO
CONFIG_RD4_AS_DIG_OUTPUT(); //Ensure that this is a digital output
if(MY_ID == 0) {
CONFIG_SCK1OUT_TO_RP(RD1_RP); //use RD5 for SCLK
CONFIG_RD1_AS_DIG_INPUT(); //Ensure that this is a digital input
}
else {
CONFIG_SCK1OUT_TO_RP(RD5_RP); //use RD5 for SCLK
CONFIG_RD5_AS_DIG_INPUT(); //Ensure that this is a digital input
}
CONFIG_DAC(); //chip select for MCP41xxx
DAC_DISABLE(); //disable the chip select
SPI1STATbits.SPIEN = 1; //enable SPI mode
}
void configSPI1(void) {
//spi clock = 40MHz/1*4 = 40MHz/4 = 10MHz
SPI1CON1 = SEC_PRESCAL_1_1 | //1:1 secondary prescale
PRI_PRESCAL_4_1 | //4:1 primary prescale
CLK_POL_ACTIVE_HIGH | //clock active high (CKP = 0)
SPI_CKE_ON | //out changes active to inactive (CKE=1)
SPI_MODE8_ON | //8-bit mode
MASTER_ENABLE_ON; //master mode
CONFIG_SDO1_TO_RP(RB8_RP); //use RP6 for SDO
//CONFIG_RB8_AS_DIG_PIN(); //Ensure that this is a digital pin
CONFIG_SCK1OUT_TO_RP(RB7_RP); //use RP7 for SCLK
//CONFIG_RB7_AS_DIG_PIN(); //Ensure that this is a digital pin
CONFIG_RB5_AS_DIG_OUTPUT(); //use RP5 for RST needs to be carefully removed
//CONFIG_RB5_AS_DIG_PIN(); //Ensure that this is a digital pin
RSTHIGH();
CONFIG_SLAVE_ENABLE(); //slave select config
//CONFIG_SLAVE_ORDY(); //output ready from slave
SLAVE_DISABLE(); //disable slave
SPI1STATbits.SPIEN = 1; //enable SPI mode
}
