109 lines
3.6 KiB
Markdown
109 lines
3.6 KiB
Markdown
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adc_trigger_src_io
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---
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This is an example to select the source (I/O) to trigger ADC start
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> It uses the specific pin to trigge ADC
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+ Select the ADC converison channel
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```
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// in main.c
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#define CONFIG_ADC_IO_SRC_PORT GPIOA
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#define CONFIG_ADC_IO_SRC_PIN GPIO_Pin_09
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#define CONFIG_TARGGET_ADC_1_CHANNEL ADC_Channel_03
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```
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+ Select the specific pin to trigger ADC
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> It supports PB1 (nRST) or PB2 (JTCK)
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>> PB1/PB2 MUST be changed to normal I/O mode
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```
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// in main.c
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#define CONFIG_ADC_EXT_TRIG_SRC ADC_ExtTrigSource_PB1
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```
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+ Select the trigger mode of the specific pin
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> It supports rising or falling trigger mode
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```
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// in main.c
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#define CONFIG_ADC_EXT_TRIG_MODE ADC_ExtTrigMode_PinRising
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```
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## Log
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Use serial port with baudrate 115200, 8bit, no parity check.
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+ Link PB1 to button
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- Trigger ADC when free button
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```
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Oct 7 2025 15:46:32
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ADC Trigger single conversion (AIN-3) from external source (Pin: PB1 Rising)
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Button = PA2
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Press Button to setup I/O trigger ...
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PB1 (nRST) => I/O
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1-th ADC Single Conv Value = 0x77C (1916) <--- Trigger ADC when free button
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2-th ADC Single Conv Value = 0x778 (1912)
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3-th ADC Single Conv Value = 0x77A (1914)
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4-th ADC Single Conv Value = 0x77E (1918)
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5-th ADC Single Conv Value = 0x77F (1919)
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```
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- Trigger ADC when press button
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```
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Oct 7 2025 15:59:09
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ADC Trigger single conversion (AIN-3) from external source (Pin: PB1 Falling)
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Button = PA2
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Press Button to setup I/O trigger ...
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PB1 (nRST) => I/O
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1-th ADC Single Conv Value = 0x775 (1909) <--- Trigger ADC when press button
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2-th ADC Single Conv Value = 0x789 (1929)
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3-th ADC Single Conv Value = 0x78A (1930)
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4-th ADC Single Conv Value = 0x777 (1911)
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```
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+ Link PB2 to button
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- Trigger ADC when free button
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```
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Oct 7 2025 16:18:35
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ADC Trigger single conversion (AIN-3) from external source (Pin: PB2 Rising)
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Button = PA2
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Press Button to setup I/O trigger ...
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1-th ADC Single Conv Value = 0x7DF (2015) <--- Link ICE handshaking
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2-th ADC Single Conv Value = 0x722 (1826)
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3-th ADC Single Conv Value = 0x6E8 (1768)
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4-th ADC Single Conv Value = 0x752 (1874)
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5-th ADC Single Conv Value = 0x748 (1864)
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6-th ADC Single Conv Value = 0x675 (1653)
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PB2 (JTCK) => I/O <--- disable ICE
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7-th ADC Single Conv Value = 0x789 (1929) <--- free button
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8-th ADC Single Conv Value = 0x7E5 (2021)
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...
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```
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- Trigger ADC when press button
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```
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Oct 3 2025 16:22:41
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ADC Trigger single conversion (AIN-3) from external source (Pin: PB2 Falling)
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Button = PA2
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Press Button to setup I/O trigger ...
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...
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31-th ADC Single Conv Value = 0x78A (1930) <--- Link ICE handshaking
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32-th ADC Single Conv Value = 0x77B (1915)
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33-th ADC Single Conv Value = 0x7A8 (1960)
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34-th ADC Single Conv Value = 0x792 (1938)
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35-th ADC Single Conv Value = 0x777 (1911) <--- Link ICE handshaking
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PB2 (JTCK) => I/O <--- disable ICE
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36-th ADC Single Conv Value = 0x7EC (2028) <--- press button
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37-th ADC Single Conv Value = 0x777 (1911)
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38-th ADC Single Conv Value = 0x78E (1934)
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39-th ADC Single Conv Value = 0x792 (1938)
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```
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