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Added radio parameters RADIO_PARAM_RSSI and RADIO_PARAM_TXPOWER for cc2420

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This commit is contained in:
Niclas Finne 2014-04-07 15:42:39 +02:00
parent 4834816306
commit 8c0cdcfaec
1 changed files with 61 additions and 0 deletions
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61
dev/cc2420/cc2420.c
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@ -84,6 +84,9 @@
#define FOOTER1_CRC_OK 0x80
#define FOOTER1_CORRELATION 0x7f
/* The RSSI_OFFSET is approximate -45 (see CC2420 specification) */
#define RSSI_OFFSET -45
#define DEBUG 0
#if DEBUG
#include <stdio.h>
@ -103,6 +106,28 @@
#define LEDS_OFF(x)
#endif
/* Conversion map between PA_LEVEL and output power in dBm
(from table 9 in CC2420 specification).
*/
struct output_config {
int8_t power;
uint8_t config;
};
static const struct output_config output_power[] = {
{ 0, 31 }, /* 0xff */
{ -1, 27 }, /* 0xfb */
{ -3, 23 }, /* 0xf7 */
{ -5, 19 }, /* 0xf3 */
{ -7, 15 }, /* 0xef */
{-10, 11 }, /* 0xeb */
{-15, 7 }, /* 0xe7 */
{-25, 3 }, /* 0xe3 */
};
#define OUTPUT_NUM (sizeof(output_power) / sizeof(struct output_config))
#define OUTPUT_POWER_MAX 0
#define OUTPUT_POWER_MIN -25
void cc2420_arch_init(void);
/* XXX hack: these will be made as Chameleon packet attributes */
@ -154,6 +179,8 @@ static int channel;
static radio_result_t
get_value(radio_param_t param, radio_value_t *value)
{
int i, v;
if(!value) {
return RADIO_RESULT_INVALID_VALUE;
}
@ -164,12 +191,33 @@ get_value(radio_param_t param, radio_value_t *value)
case RADIO_PARAM_CHANNEL:
*value = cc2420_get_channel();
return RADIO_RESULT_OK;
case RADIO_PARAM_TXPOWER:
v = cc2420_get_txpower();
*value = OUTPUT_POWER_MIN;
/* Find the actual estimated output power in conversion table */
for(i = 0; i < OUTPUT_NUM; i++) {
if(v >= output_power[i].config) {
*value = output_power[i].power;
break;
}
}
return RADIO_RESULT_OK;
case RADIO_PARAM_RSSI:
/* Return the RSSI value in dBm */
*value = cc2420_rssi() + RSSI_OFFSET;
return RADIO_RESULT_OK;
case RADIO_CONST_CHANNEL_MIN:
*value = 11;
return RADIO_RESULT_OK;
case RADIO_CONST_CHANNEL_MAX:
*value = 26;
return RADIO_RESULT_OK;
case RADIO_CONST_TXPOWER_MIN:
*value = OUTPUT_POWER_MIN;
return RADIO_RESULT_OK;
case RADIO_CONST_TXPOWER_MAX:
*value = OUTPUT_POWER_MAX;
return RADIO_RESULT_OK;
default:
return RADIO_RESULT_NOT_SUPPORTED;
}
@ -178,6 +226,8 @@ get_value(radio_param_t param, radio_value_t *value)
static radio_result_t
set_value(radio_param_t param, radio_value_t value)
{
int i;
switch(param) {
case RADIO_PARAM_POWER_MODE:
if(value == RADIO_POWER_MODE_ON) {
@ -195,6 +245,17 @@ set_value(radio_param_t param, radio_value_t value)
}
cc2420_set_channel(value);
return RADIO_RESULT_OK;
case RADIO_PARAM_TXPOWER:
/* Find the closest higher PA_LEVEL for the desired output power */
for(i = 1; i < OUTPUT_NUM; i++) {
if(value > output_power[i].power) {
cc2420_set_txpower(output_power[i - 1].config);
return RADIO_RESULT_OK;
}
}
/* Set lowest output power */
cc2420_set_txpower(output_power[OUTPUT_NUM - 1].config);
return RADIO_RESULT_OK;
default:
return RADIO_RESULT_NOT_SUPPORTED;
}