work on spi implementation

ked/csl/interfaces/spi.h

@@ -25,13 +25,13 @@ extern "C" {
 
 /** This is the spi hardware channel class*/
 
-void spi_initMaster(spiCH_t spic_hw_ch);
+void spi_initMaster(spiCH_t spi_hw_ch);
 
 
 /*!
  * @brief Transmits and receives on byte of data
  * @param spi_hw_ch SPI hardware channel
- * @param tx_data 'tx_data' The pyte to be transmitted"
+ * @param tx_data 'tx_data' The byte to be transmitted"
  * @return The received data
  */
 uint8_t spi_trx(spiCH_t spi_hw_ch, uint8_t tx_data);

ked/csl/stm32f042/Src/CMakeLists.txt

@@ -29,3 +29,9 @@ target_compile_definitions(stmTimer PRIVATE ${C_DEFS})
 target_include_directories(stmTimer PUBLIC ${INTERFACES_DIR} ${CSL_INCLUDES})
 add_library(sub::timer ALIAS stmTimer)
 
+add_library(stmSPI spi.c)
+target_compile_options(stmSPI PRIVATE ${C_FLAGS})
+target_compile_definitions(stmSPI PRIVATE ${C_DEFS})
+target_include_directories(stmSPI PUBLIC ${INTERFACES_DIR} ${CSL_INCLUDES})
+add_library(sub::spi ALIAS stmSPI)
+

ked/csl/stm32f042/Src/spi.c

@@ -4,7 +4,7 @@
 
 // https://controllerstech.com/spi-using-registers-in-stm32/
 
-void spi_initMater(spiCH_t_spi_hw_ch)
+void spi_initMater(spiCH_t spi_hw_ch)
 {
 	RCC->APB2ENR |= (1<<12);  // Enable SPI1 CLock
 	
@@ -25,8 +25,23 @@ void spi_initMater(spiCH_t_spi_hw_ch)
 	SPI1->CR2 = 0;
 }
 
-uint8_t spi_trx(spiCH_t_spi_hw_ch, uint8_t tx_data)
+uint8_t spi_trx(spiCH_t spi_hw_ch, uint8_t tx_data)
 {
+	uint8_t data;
+	// example
+
+
+	while (((SPI1->SR)&(1<<7)));  // wait for BSY bit to Reset -> This will indicate that SPI is not busy in communication
+	
+	SPI1->DR = tx_data;  // send data
+	
+	while (!((SPI1->SR) &(1<<0)));  // Wait for RXNE to set -> This will indicate that the Rx buffer is not empty
+	data = SPI1->DR;
+	
+	return data;
+
+// implementation 2. step
+#if 0
 	// wait for SPY ready
 	while((SPI_BASE->SR) & (1 << 7));
 
@@ -37,4 +52,5 @@ uint8_t spi_trx(spiCH_t_spi_hw_ch, uint8_t tx_data)
 	while(!((SPI_BASE->SR) & (1<<0));
 	
 	return SPI_BASE->DR;
+#endif
 }

ked/csl/stm32f042/config.cmake

@@ -77,3 +77,4 @@ list(APPEND EXTRA_LIBS sub::pin)
 list(APPEND EXTRA_LIBS sub::usart)
 list(APPEND EXTRA_LIBS sub::timer)
 list(APPEND EXTRA_LIBS sub::init)
+list(APPEND EXTRA_LIBS sub::spi)

main.c

@@ -77,10 +77,11 @@ int main(int argc, char *argv[])
 	pinWrite(pinB3,0);
 
 	spi_initMaster(SPI_CH_1);
-	while(1) {
+	for(i = 10; i > 0; i--) {
 		spi_trx(SPI_CH_1, 0xAE);
 	}
 
+	pinWrite(pinB3,1);
 	//timer_capture_compare_test(timer_2);
 	//print_Usart(usart2, "All is working fine \r\n"); 
 

tmux_workbench.sh

@@ -6,7 +6,7 @@ echo $dir
 tmux new -s 'git' -d 'fish'
 tmux new -s 'compile' -d 'fish'
 
-tmux new -s 'main' -d 'vim main.cpp'
+tmux new -s 'main' -d 'fish'
 
 cd $dir/ked/csl/stm32f042/Src/
 tmux new -s 'src' -d 'fish'
@@ -17,4 +17,7 @@ tmux new -s 'device' -d 'fish'
 cd $dir/ked/csl/interfaces/
 tmux new -s 'interface' -d 'fish'
 
+cd $dir/ked/
+tmux new -s 'KED submodule' -d 'fish'
+
 tmux a