First of all, sorry for my poor english... I have a little of experience with pic32 but, i am stuck trying to operate a max7219 that drives a 8x8 led matrix, like this one https://www.elabpeers.com/max7219-8x8-dot-led-matrix-display.html .
The problem is: i know that i need to configure SPI module in order to communicate with max7219, but until now i got nothing. my board is MAX32 from Digilent with a PIC32MX795F512L.
I know that i have 8 bits for data 4 bits to address and other 4 are irrelevant, like this:
Ill post my code here:
-----------------------------------
SPI Init
void spiInit(){
SPI2CONbits.ON = 0; // Disable SPI2
SPI2CONbits.CKP = 1; // IDLE state as 0
SPI2CONbits.CKE = 0; // Clock active transition from 1 to 0
SPI2CONbits.SMP = 0;
SPI2CONbits.MODE16 = 1; // Use 16 bit SPI interface
SPI2CONbits.MODE32 = 0; // Use 32 bit SPI interface
SPI2CONbits.ENHBUF = 0; // Enable TX/RX
SPI2CONbits.MSTEN = 1; // Enable master mode
SPI2STATbits.SPIROV = 0; // Clear overflow error flag
SPI2BRG = 4;
SPI2CONbits.ON = 1; // Enable SPI2 module
}
-----------------------------------
MAX7219 Send Data
void maxWrite(uint16_t address, uint8_t data){
uint16_t dataToSend = 0x0000;
address = address & 0x000F; // Limit address to 4 bits
data = data & 0x00FF; // Limit data to 8 bits
dataToSend = (0x0 << 12) | (address << 8) | data;
SPI2BUF = dataToSend; // Info to max7219 module
while(SPI2ASTATbits.SPIRBE); // Wait while SPI is sending info
}
Can someone else please help me
Thanks
The problem is: i know that i need to configure SPI module in order to communicate with max7219, but until now i got nothing. my board is MAX32 from Digilent with a PIC32MX795F512L.
I know that i have 8 bits for data 4 bits to address and other 4 are irrelevant, like this:
Ill post my code here:
-----------------------------------
SPI Init
void spiInit(){
SPI2CONbits.ON = 0; // Disable SPI2
SPI2CONbits.CKP = 1; // IDLE state as 0
SPI2CONbits.CKE = 0; // Clock active transition from 1 to 0
SPI2CONbits.SMP = 0;
SPI2CONbits.MODE16 = 1; // Use 16 bit SPI interface
SPI2CONbits.MODE32 = 0; // Use 32 bit SPI interface
SPI2CONbits.ENHBUF = 0; // Enable TX/RX
SPI2CONbits.MSTEN = 1; // Enable master mode
SPI2STATbits.SPIROV = 0; // Clear overflow error flag
SPI2BRG = 4;
SPI2CONbits.ON = 1; // Enable SPI2 module
}
-----------------------------------
MAX7219 Send Data
void maxWrite(uint16_t address, uint8_t data){
uint16_t dataToSend = 0x0000;
address = address & 0x000F; // Limit address to 4 bits
data = data & 0x00FF; // Limit data to 8 bits
dataToSend = (0x0 << 12) | (address << 8) | data;
SPI2BUF = dataToSend; // Info to max7219 module
while(SPI2ASTATbits.SPIRBE); // Wait while SPI is sending info
}
Can someone else please help me
Thanks
