SLAAEB1 December 2023 MSPM0G1105 , MSPM0G1106 , MSPM0G1107 , MSPM0G1505 , MSPM0G1506 , MSPM0G1507 , MSPM0G3105 , MSPM0G3105-Q1 , MSPM0G3106 , MSPM0G3106-Q1 , MSPM0G3107 , MSPM0G3107-Q1 , MSPM0G3505 , MSPM0G3505-Q1 , MSPM0G3506 , MSPM0G3506-Q1 , MSPM0G3507 , MSPM0G3507-Q1 , MSPM0L1105 , MSPM0L1106 , MSPM0L1303 , MSPM0L1304 , MSPM0L1305 , MSPM0L1306 , MSPM0L1343 , MSPM0L1344 , MSPM0L1345 , MSPM0L1346
The ADC to UART subsystem example demonstrates how to use the internal ADC to convert an analog signal into a digital representation and transfer the result through UART. The example configures the MCU to act as an external ADC and send raw ADC data through UART. Optionally the MCU can also preprocess the data then send it through I2C. Download the code for the ADC to UART example.
The following figure shows a block diagram of the system.
The application requires the internal ADC and 1 instance of UART
Sub-block Functionality | Peripheral Used | Notes |
---|---|---|
Analog Signal Capture | ADC | Called ADC12_0_INST in code |
Sending ADC data | UART | 2 UART transactions are done to send the full ADC data. |
Based on the requirements in the table above, the compatible devices are listed below. The corresponding EVM may be used for quick evaluation.
Compatible Devices | EVM |
---|---|
MSPM0Lxxx | LP-MSPM0L1306 |
MSPM0Gxxx | LP-MSPM0G3507 |
The UART peripheral sends data in packets of 8 bits at a time. The ADC module stores the data into a 16-bit register. To transmit the data through the UART peripheral, the ADC data must be split into high and low bytes. The high byte contains the upper 8 bits while the low byte contains the lower 8 bits. Below is the code to split the ADC result and transmit the data through UART.
gADCResult = DL_ADC12_getMemResult(ADC12_0_INST, DL_ADC12_MEM_IDX_0);
uint8_t lowbyte = (uint8_t)(gADCResult & 0xFF);
uint8_t highbyte = (uint8_t)((gADCResult >> 8) & 0xFF);
DL_UART_Main_transmitData(UART_0_INST, highbyte);
DL_UART_Main_transmitData(UART_0_INST, lowbyte);