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update ulp st doc

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Merges https://github.com/espressif/esp-idf/pull/5222
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boarchuz
2020-05-01 00:20:33 +10:00
committed by Ivan Grokhotkov
parent 9d093d3a04
commit 7e7c044afa
3 changed files with 8 additions and 6 deletions
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5
components/ulp/include/esp32/ulp.h
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@@ -464,10 +464,11 @@ static inline uint32_t SOC_REG_TO_ULP_PERIPH_SEL(uint32_t reg) {
* reg_addr register and offset_ field (this offset is expressed in 32-bit words).
* 32 bits written to RTC memory are built as follows:
* - bits [31:21] hold the PC of current instruction, expressed in 32-bit words
* - bits [20:16] = 5'b1
* - bits [20:18] = 3'b0
* - bits [17:16] reg_addr (0..3)
* - bits [15:0] are assigned the contents of reg_val
*
* RTC_SLOW_MEM[addr + offset_] = { 5'b0, insn_PC[10:0], val[15:0] }
* RTC_SLOW_MEM[addr + offset_] = { insn_PC[10:0], 3'b0, reg_addr, reg_val[15:0] }
*/
#define I_ST(reg_val, reg_addr, offset_) { .st = { \
.dreg = reg_val, \