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Allow the caller to access the entire content of CMDSTA

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When sending a command to the CC13xx/CC25xx RF core, we wait for command completion by checking the LSB of CMDSTA (correctly so). However, in doing so we also zero out the 3 CMDSTA return bytes. For some commands, those bytes contain useful information (e.g. an RSSI value) and are required by the caller.

This problem manifests itself e.g. in PROP mode `channel_clear()`, whereby the caller will always see an RSSI value of 0.

This pull therefore fixes the logic in `rf_core_send_cmd()` to check for command completion by blocking on the CMDSTA result byte without zeroing out the 3 return bytes.

Fixes #1465
This commit is contained in:
George Oikonomou 2016-01-24 13:39:02 +00:00
parent 9a5682b75b
commit d42b1b50e5
1 changed files with 2 additions and 2 deletions
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4
cpu/cc26xx-cc13xx/rf-core/rf-core.c
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@ -160,7 +160,7 @@ rf_core_send_cmd(uint32_t cmd, uint32_t *status)
HWREG(RFC_DBELL_BASE + RFC_DBELL_O_CMDR) = cmd;
do {
*status = HWREG(RFC_DBELL_BASE + RFC_DBELL_O_CMDSTA) & 0xFF;
*status = HWREG(RFC_DBELL_BASE + RFC_DBELL_O_CMDSTA);
if(++timeout_count > 50000) {
PRINTF("rf_core_send_cmd: 0x%08lx Timeout\n", cmd);
if(!interrupts_disabled) {
@ -168,7 +168,7 @@ rf_core_send_cmd(uint32_t cmd, uint32_t *status)
}
return RF_CORE_CMD_ERROR;
}
} while(*status == RF_CORE_CMDSTA_PENDING);
} while((*status & RF_CORE_CMDSTA_RESULT_MASK) == RF_CORE_CMDSTA_PENDING);
if(!interrupts_disabled) {
ti_lib_int_master_enable();