Usage example
Get A/D conversion results of 1 pin 4 times. Then, calculate the average of the results.
[GUI setting example]
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32-bit multiply-accumlator |
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MAC32bit |
Used | |||
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32-bit multiply-accumlator operation setting |
Used | |||
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Fixed point mode setting |
Disable | |||
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Enable multiply-accumulation overflow/underflow (INTMACLOF） |
Unused | |||
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A/Dconvertor |
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ADC |
Used | |||
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A/D convertor operation setting |
Used | |||
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Comparator operation setting |
Stop | |||
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Resolution |
10 bits | |||
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VREF(+) setting |
VDD | |||
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VREF(-) setting |
VSS | |||
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Trigger setting mode |
Software trigger mode | |||
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Operation mode setting |
One-shot select mode | |||
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ANI0 – ANI5 analog input selection |
ANI0 |
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A/D channel selection |
ANI0 |
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Conversion time mode |
Normal 1 |
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Conversion time |
608/fCLK 25.3333(μs) |
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Conversion result upper/lower bound value setting |
Generates an interrupt request (INTAD) when ADLL≦ADCRH≦ADUL |
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Upper bound (ADUL) value |
255 |
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Lower bound (ADLL) value |
0 |
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Use A/D interrupt (INTAD) |
Unused |
[API setting example]
r_cg_main.c
/* Start user code for global. Do not edit comment generated here */
volatile mac32bit_uint64_t g_mac32bit_buf;
volatile uint16_t g_adc_fix;
volatile uint16_t g_buffer;
volatile uint8_t g_cnt;
/* End user code. Do not edit comment generated here */
void main(void)
{
R_MAIN_UserInit();
/* Start user code. Do not edit comment generated here */
/* Start the AD converter */
R_ADC_Start();
while (1U)
{
while (0U == ADIF)
{
;
}
ADIF = 0U;
/* Return the conversion result in the buffer */
R_ADC_Get_Result((uint16_t *)&g_buffer);
/* Caculate unsigned values in multiply-accumulation mode */
R_MAC32Bit_MACUnsigned(1U, g_buffer, (mac32bit_uint64_t *)&g_mac32bit_buf);
if ((++g_cnt) >= 4U)
{
g_cnt = 0U;
g_adc_fix = (g_mac32bit_buf.low_low >> 4U);
g_mac32bit_buf.low_low = 0U;
g_mac32bit_buf.low_high = 0U;
g_mac32bit_buf.high_low = 0U;
g_mac32bit_buf.high_high = 0U;
}
}
/* End user code. Do not edit comment generated here */
}