Supported Targets |
BK7236 |
SPI_SLAVE
Overview
This project is used for demonstrating SPI User Guide .
The SPI function of BK7236 is still under development and improvement, please note the following restrictions
This project only supports running on 8M FLASH.
Hardware Requirements
BK7236 development board with 8MB FLASH and 40MHz crystal.(e.g., BK7236_V1 QFN80_8X8 2022.10.18).
BK7236 download firmware with uart board, such as BEKEN 20221108 UART_V8.
Note
How to download firmware please reference this doc Burn Code
BK7236 SPI project need 2 boards at least, and all of them need to support SPI function.And they connection is shown as Figure SPI Connection below.
SPI Connection
Note
SPI project should be consist of only one SPI_mater device and one SPI_slave at least.If the SPI system just consist of two devices, so they must be one master and one slave.
Software Requirements
Note
You can clone Armino SDK by referring to this doc Armino SDK Code download step by step.
Configure and Build
Configure
The SPI slave device should be configured as follows:
SPI ID
SPI_BAUD_RATE
SPI_BUF_LEN
SPI_TX_TIMEOUT
SPI_RX_TIMEOUT
UART_ID
SPI_ROLE
SPI_BIT_WIDTH
SPI_POLARITY_MODE
SPI_PHASE_MODE
SPI_WIRE_MODE
SPI_BIT_ORDER_MODE
DMA_MODE
Note
The configuration of SPI master device is almost the same as that configuration of SPI slave device.The only difference is the configuration of SPI_ROLE which will be SPI_master_role or SPI_slave_role.
Build
Enter the following command in Armino root directory to compile:
make bk7236 PROJECT=examples/peripherals/spi/spi_slave
For preparation such as toolchain installation, please refer to Quick Start.
Connect UART
UART0 is used for:
BKFIL to download images
Logging and CLI
FLASH all-app.bin
Burn Armino/build/spi_slave/bk7236/app-app.bin to the board using BKFIL.
Running and Output
Case 1 - SPI_slave Send data
SPI_slave_device Send Operation
Case 1.1 edit the function of main() in spi_slave_main.c, and you will send 0~1023 to SPI_master_device.
1int main(void)
2{
3 BK_LOG_ON_ERR(bk_spi_driver_init());
4 BK_LOG_ON_ERR(spi_example_send_data());
5 // BK_LOG_ON_ERR(spi_example_dma_send_data());
6 // BK_LOG_ON_ERR(spi_example_recv_data());
7 // BK_LOG_ON_ERR(spi_example_dma_recv_data());
8
9 return 0;
10}
Case 1.2 edit the function of main() in spi_slave_main.c, and you will send 0~1023 to SPI_master_device through DMA which write data to SPI regesiter.
1int main(void)
2{
3 BK_LOG_ON_ERR(bk_spi_driver_init());
4 // BK_LOG_ON_ERR(spi_example_send_data());
5 BK_LOG_ON_ERR(spi_example_dma_send_data());
6 // BK_LOG_ON_ERR(spi_example_recv_data());
7 // BK_LOG_ON_ERR(spi_example_dma_recv_data());
8
9 return 0;
10}
Case 2 - SPI_slave Receive data
SPI_slave_device Receive Operation
Case 2.1 edit the function of main() in spi_slave_main.c, and you will receive data from SPI_master_device.
1int main(void)
2{
3 BK_LOG_ON_ERR(bk_spi_driver_init());
4 // BK_LOG_ON_ERR(spi_example_send_data());
5 // BK_LOG_ON_ERR(spi_example_dma_send_data());
6 BK_LOG_ON_ERR(spi_example_recv_data());
7 // BK_LOG_ON_ERR(spi_example_dma_recv_data());
8
9 return 0;
10}
Case 2.2 edit the function of main() in spi_slave_main.c, and you will receive data from SPI_master_device through DMA which read data from SPI regesiter.
1int main(void)
2{
3 BK_LOG_ON_ERR(bk_spi_driver_init());
4 // BK_LOG_ON_ERR(spi_example_send_data());
5 // BK_LOG_ON_ERR(spi_example_dma_send_data());
6 // BK_LOG_ON_ERR(spi_example_recv_data());
7 BK_LOG_ON_ERR(spi_example_dma_recv_data());
8
9 return 0;
10}