void cmd_write (uint64_t cluster, uint8_t adcport, uint64_t maxsize, uint8_t speed)
{
uart_puts_P("Writing...\r\n");
uint16_t maxblocks = maxsize / 512;
uint16_t block = 0;
char c = 0x00;
while(c != 'q')
{
char values[512] = {0x00};
for (uint16_t i = 0; i<=80; ++i)
{
adc_request(adcport);
uint16_t adcvalue = adc_read();
string_append(values, num2str(adcvalue, 10));
string_append(values, "\r\n");
for (uint8_t d = 0; d<=speed; ++d)
_delay_ms(3);
uart_puts(num2str(i, 10));
uart_puts(": ");
uart_puts(num2str(adcvalue, 10));
uart_puts("\r\n");
c = uart_getc();
if (c == 'q') break;
}
fat_write_file(cluster, (unsigned char*)values, block);
++block;
if (block >= maxblocks) break;
}
uart_puts_P("...done\r\n");
}
/*---------------------------------------------------------------------------*/
uint8_t initialize_adcModule(uint32_t sps, uint32_t sysclkHz, ADC_MODE mode, uint8_t bitResolution, ADC_INIT_OPT *opt)
{
uint32_t divTable[8] = {4, 8, 16, 32, 64, 128, 256, 512};
//J 動作モードと、ビット解像度をチェック
if ((mode != ADC_ONESHOT) && (mode != ADC_FREERUN) ) {
return ADC_UNKNOWN_CAPTURE_MODE;
}
if ((bitResolution != 8) && (bitResolution != 12)) {
return ADC_INVALID_BIT_RESOLUTION;
}
//J オプション処理
uint8_t vref_bitmap = 0;
if (opt == NULL) {
//J デフォルトはこれ
vref_bitmap = ADC_REFSEL_INTVCC_gc;
} else {
vref_bitmap = ADC_REFSEL_gm & (opt->vrefSelect << ADC_REFSEL_gp);
}
//J 適当なSAMPVALになるようなDIVを見つける
//J ねらったようにならないので、SPSを適当に当てて、現物合わせで使う
int i=0;
uint32_t sampval = 0;
for (i=0 ; i<8 ; ++i) {
sampval = (sysclkHz / divTable[i]) / ((bitResolution/2) * sps);
if (sampval <= ADC_SAMPVAL_gm) {
break;
} else {
sampval = 0xff;
}
}
if (sampval > ADC_SAMPVAL_gm) {
return ADC_INVALID_SAMPLING_RATE;
}
//J ADCのモードを変更
uint8_t ret = adc_request(mode, bitResolution);
if (ret != ADC_OK) {
return ret;
}
/* 24.14.3 REFCTRL ? Reference Control register */
ADCA.REFCTRL = (ADCA.REFCTRL & ~ADC_PRESCALER_gm) | vref_bitmap;
/* 24.14.4 EVCTRL ? Event Control register */
// I don't use event control.
/* 24.14.5 PRESCALER ? Clock Prescaler register */
ADCA.PRESCALER = (i << ADC_PRESCALER_gp);
/* 24.14.8 SAMPCTRL ? Sampling Time Control register */
ADCA.SAMPCTRL = (uint8_t)sampval;
//J PAD GNDの状況を確認して、結果から引く(GAIN x1の場合のみ)
/* 24.15.1 CTRL ? Control register */
ADCA.CH0.CTRL = ADC_CH_INPUTMODE_INTERNAL_gc | ((ADC_GAIN_1X << ADC_CH_GAIN_gp) & ADC_CH_GAIN_gm);
/* 24.15.2 MUXCTRL ? MUX Control register */
ADCA.CH0.MUXCTRL = (ADC_CH_MUXNEGL_GND_gc) | ADC_CH_MUXNEGL_INTGND_gc;
/* 24.15.3 INTCTRL ? Interrupt Control register */
//J ポーリングするので、IntlevelはOffで良い
ADCA.CH0.INTCTRL = ADC_CH_INTMODE_COMPLETE_gc | ADC_CH_INTLVL_OFF_gc;
/* 24.14.1 CTRLA ? Control register A */
ADCA.CTRLA |= ADC_START_bm | ADC_ENABLE_bm;
/* 24.14.6 INTFLAGS ? Interrupt Flags register */
while (ADCA.INTFLAGS == 0);
ADCA.INTFLAGS = ADC_CH0IF_bm; // Clear
sGndLevelGainX1 = (ADCA.CH0RES);
return ADC_OK;
}
