October 15, 2012
about 2 years ago
I want to read and write registers of L6470. Do i need to make the Flag pin high or low? another question is i cannot read any register , i cannot read signal no MISO line ? any suggestions?
I am using SPi bus in the following way to read and write L6470 registers. it would be nice if someone could tell me what mistake i am doing. I cannot get signal on SDO pin when i try to read any register
PORTC.DIRSET = SPIC_CS ;
PORTC.DIRSET = SPIC_MOSI ;
PORTC.DIRSET = SPIC_SCK ;
// Configuration of SPI bus for port C
SPIC_CTRL |= SPI_ENABLE_bm |SPI_MASTER_bm ; // Set Enable bit in control register using bit mask and SPI in master mode
SPIC_CTRL |= SPI_MODE_3_gc; // Set SPI mode.
//SPIC_CTRL |= SPI_PRESCALER_DIV4_gc; // Choosing the freq, we have chosen the max freq
//SPIC_CTRL |= SPI_PRESCALER_DIV16_gc; // Choosing the freq, we have chosen the max freq
SPIC_CTRL |= SPI_PRESCALER_DIV64_gc; // Choosing the freq, we have chosen the max freq
//SPIC_CTRL |= SPI_CLK2X_bm; // Doubling the SPI speed (SCK freq) in Master Mode
SPIC_INTCTRL |= SPI_INTLVL_OFF_gc ; // Disabling the interrupt
uint32_t dSPIN_Get_Param(dSPIN_Registers_TypeDef param)
uint32_t temp = 0;
uint32_t rx = 0;
/* Send GetParam operation code to dSPIN */
temp = dSPIN_Write_Byte(dSPIN_GET_PARAM | param); // param is the respective register address listed in table 12 of data sheet
/* MSB which should be 0 */
temp = temp
I am using L6470 chip and trying to read and write any register.if i want to write ACC register, i need to send three bytes. First byte is the command byte and then following are two bytes to write the value on register. My question is do i need to make the chip select pin high after i write each byte ? or i should write all three bytes and then make the chip select pin high? i use actually both ways and tried to write the value and then i tried to read it , i could not get any signal on SDO line. I can only see CS.CK and MOSI pins. I am using Atxmega 1283
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