2023-04-10 10:04 PM
Hi beloved friends of software architecture,
i try to programm an SPI communication protocol of an STM32F373CCT6. It should communicate to the powerSTEP01 in order to move a motor. The problem is that i dont get any answer of the powerSTEP01. Did i do anything wrong with my SPI communication setup?
I try to do so using the following conditions:
Thank you for your help in advance here is my SPI protocol code:
HAL_GPIO_WritePin(GPIOF, GPIO_PIN_6, GPIO_PIN_SET); //nSTBY/nRESET Pin is set
HAL_GPIO_WritePin(GPIOA, GPIO_PIN_4, GPIO_PIN_SET); //SPI_CS Pin set (When CS is high the device is unselected and the SDO line is inactive)
HAL_Delay(100);
HAL_GPIO_WritePin(GPIOA, GPIO_PIN_4, GPIO_PIN_RESET); //SPI_CS Pin reset
HAL_SPI_Transmit(&hspi1, &value_config_set[5], 1, 100);
HAL_SPI_Receive(&hspi1, &value_config_set[2], 1, 100);
HAL_GPIO_WritePin(GPIOA, GPIO_PIN_4, GPIO_PIN_SET); //SPI_CS Pin set
HAL_Delay(100);
HAL_GPIO_WritePin(GPIOA, GPIO_PIN_4, GPIO_PIN_RESET); //SPI_CS Pin reset
HAL_SPI_Transmit(&hspi1, &value_config_set[4], 1, 100);
HAL_SPI_Receive(&hspi1, &value_config_set[1], 1, 100);
HAL_GPIO_WritePin(GPIOA, GPIO_PIN_4, GPIO_PIN_SET); //SPI_CS Pin set
HAL_Delay(100);
HAL_GPIO_WritePin(GPIOA, GPIO_PIN_4, GPIO_PIN_RESET); //SPI_CS Pin reset
HAL_SPI_Transmit(&hspi1, &value_config_set[3], 1, 100);
HAL_SPI_Receive(&hspi1, &value_config_set[0], 1, 100);
HAL_GPIO_WritePin(GPIOA, GPIO_PIN_4, GPIO_PIN_SET); //SPI_CS Pin set
HAL_Delay(100);
HAL_GPIO_WritePin(GPIOA, GPIO_PIN_4, GPIO_PIN_RESET); //SPI_CS Pin reset
HAL_SPI_Transmit(&hspi1, &value_config_get[5], 1, 100);
HAL_SPI_Receive(&hspi1, &value_config_get[2], 1, 100);
HAL_GPIO_WritePin(GPIOA, GPIO_PIN_4, GPIO_PIN_SET); //SPI_CS Pin set
HAL_Delay(100);
HAL_GPIO_WritePin(GPIOA, GPIO_PIN_4, GPIO_PIN_RESET); //SPI_CS Pin reset
HAL_SPI_Transmit(&hspi1, &value_config_get[4], 1, 100);
HAL_SPI_Receive(&hspi1, &value_config_get[1], 1, 100);
HAL_GPIO_WritePin(GPIOA, GPIO_PIN_4, GPIO_PIN_SET); //SPI_CS Pin set
HAL_Delay(100);
HAL_GPIO_WritePin(GPIOA, GPIO_PIN_4, GPIO_PIN_RESET); //SPI_CS Pin reset
HAL_SPI_Transmit(&hspi1, &value_config_get[3], 1, 100);
HAL_SPI_Receive(&hspi1, &value_config_get[0], 1, 100);
HAL_GPIO_WritePin(GPIOA, GPIO_PIN_4, GPIO_PIN_SET); //SPI_CS Pin set
HAL_Delay(100);
2023-04-14 05:01 AM
Hi @SJank.3 ,
concerning the point 2 (with reference to the Figure 25 of powerSTEP01 datasheet) the device uses a SPI Mode 3 (CPOL=1, CPHA=1).
Let me know if this info solves your issue.
2023-04-14 01:57 PM - edited 2023-11-20 08:34 AM
Hi Cristiana, thank you for your answer, SPI Mode 3 doesnt solve my problem but thank you for your help to understand that Figure 25. It is one more step in the right direction i guess^^I tried to set the configuration register of the powerSTEP01 and for this i am using the SetParam() command which(from my point of view, the datasheet is a little bit confusing) consists of the write part 000 and the Hexaddress 11010. These combined gives me an 8 bit command 0b00011010 == 0x1A. After this byte i send two more bytes to change the config register of the powerSTEP01.
After that i want to read the config register back and want to see if i changed something. I do this with GetParam() which is 0b00111010 == 0x3A and two more received bytes which should show the config register configuration in the two bytes over the yellow arrays.
2023-04-15 04:57 AM
why do you think the device uses SPI Mode 3 ? Because in the description above the Figure 25 it is mentioned: "The SDI is sampled on the rising edges of the CK.The SDO is latched on the falling edges of the CK."
2023-05-03 01:00 AM
Hello @SJank.3,
if we exclude a SPI configuration or CS signal management problem, the only remaining is the code.
I can only suggest to share with us the SPI signals behavior using a logic analyzer.