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libatrf: further modularized transmit power setting and exported conversion
- lib/misctxrx.c (tx_pwr_230, tx_pwr_231): declare tables as "const" - lib/misctxrx.c (POWER_TABLE_SIZE, set_power_dBm): don't open-code the table size calculation - lib/misctxrx.c (tx_power_table, set_power_dBm): moved transmit power table selection out of set_power_dBm - include/misctxrx.h (tx_power_dBm2step, tx_power_step2dBm), lib/misctxrx.c (tx_power_dBm2step, tx_power_step2dBm, set_power_dBm): moved conversion functions out of set_power_dBm and made them globally available
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@ -21,6 +21,9 @@
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uint8_t wait_for_interrupt(struct atrf_dsc *dsc, uint8_t wait_for,
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uint8_t ignore, int sleep_us, int timeout);
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int tx_power_dBm2step(struct atrf_dsc *dsc, double power);
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double tx_power_step2dBm(struct atrf_dsc *dsc, int step);
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void set_power_step(struct atrf_dsc *dsc, int power, int crc);
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void set_power_dBm(struct atrf_dsc *dsc, double power, int crc);
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@ -94,7 +94,7 @@ out:
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/* ----- Transmit power ---------------------------------------------------- */
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static double tx_pwr_230[] = {
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static const double tx_pwr_230[] = {
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3.0, 2.6, 2.1, 1.6,
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1.1, 0.5, -0.2, -1.2,
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-2.2, -3.2, -4.2, -5.2,
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@ -102,7 +102,7 @@ static double tx_pwr_230[] = {
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};
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static double tx_pwr_231[] = {
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static const double tx_pwr_231[] = {
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3.0, 2.8, 2.3, 1.8,
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1.3, 0.7, 0.0, -1,
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-2, -3, -4, -5,
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@ -110,6 +110,9 @@ static double tx_pwr_231[] = {
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};
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#define POWER_TABLE_SIZE (sizeof(tx_pwr_230)/sizeof(*tx_pwr_230))
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void set_power_step(struct atrf_dsc *dsc, int power, int crc)
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{
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uint8_t tmp;
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@ -132,27 +135,52 @@ void set_power_step(struct atrf_dsc *dsc, int power, int crc)
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}
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void set_power_dBm(struct atrf_dsc *dsc, double power, int crc)
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static const double *tx_power_table(struct atrf_dsc *dsc)
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{
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const double *tx_pwr;
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int n;
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switch (atrf_identify(dsc)) {
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case artf_at86rf230:
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tx_pwr = tx_pwr_230;
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break;
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return tx_pwr_230;
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case artf_at86rf231:
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tx_pwr = tx_pwr_231;
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return tx_pwr_231;
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break;
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default:
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abort();
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}
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}
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for (n = 0; n != sizeof(tx_pwr_230)/sizeof(*tx_pwr_230)-1; n++)
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int tx_power_dBm2step(struct atrf_dsc *dsc, double power)
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{
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const double *tx_pwr = tx_power_table(dsc);
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int n;
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for (n = 0; n != POWER_TABLE_SIZE-1; n++)
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if (tx_pwr[n] <= power)
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break;
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if (fabs(tx_pwr[n]-power) > 0.01)
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fprintf(stderr, "TX power %.1f dBm\n", tx_pwr[n]);
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set_power_step(dsc, n, crc);
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return n;
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}
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double tx_power_step2dBm(struct atrf_dsc *dsc, int step)
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{
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const double *tx_pwr = tx_power_table(dsc);
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if (step < 0 || step > POWER_TABLE_SIZE)
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abort();
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return tx_pwr[step];
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}
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void set_power_dBm(struct atrf_dsc *dsc, double power, int crc)
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{
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int step;
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double got;
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step = tx_power_dBm2step(dsc, power);
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got = tx_power_step2dBm(dsc, step);
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if (fabs(got-power) > 0.01)
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fprintf(stderr, "TX power %.1f dBm\n", got);
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set_power_step(dsc, step, crc);
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}
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