53 lines
1.1 KiB
C
53 lines
1.1 KiB
C
// Module for RTC user memory access
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#include "module.h"
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#include "lauxlib.h"
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#include "esp_attr.h"
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#define RTC_USER_MEM_NUM_DWORDS 128
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RTC_NOINIT_ATTR uint32_t rtc_memory[RTC_USER_MEM_NUM_DWORDS];
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static int rtcmem_read32 (lua_State *L)
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{
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int idx = luaL_checkinteger (L, 1);
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int n = (lua_gettop(L) < 2) ? 1 : lua_tointeger (L, 2);
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if (n == 0 || !lua_checkstack (L, n)) {
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return 0;
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}
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int ret = 0;
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while (n > 0 && idx >= 0 && idx < RTC_USER_MEM_NUM_DWORDS)
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{
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lua_pushinteger (L, rtc_memory[idx++]);
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--n;
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++ret;
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}
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return ret;
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}
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static int rtcmem_write32 (lua_State *L)
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{
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int idx = luaL_checkinteger (L, 1);
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int n = lua_gettop (L) - 1;
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luaL_argcheck (
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L, idx + n <= RTC_USER_MEM_NUM_DWORDS, 1, "RTC mem would overrun");
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int src = 2;
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while (n-- > 0)
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{
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rtc_memory[idx++] = (uint32_t) lua_tointeger(L, src++);
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}
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return 0;
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}
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// Module function map
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LROT_BEGIN(rtcmem, NULL, 0)
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LROT_FUNCENTRY( read32, rtcmem_read32 )
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LROT_FUNCENTRY( write32, rtcmem_write32 )
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LROT_END(rtcmem, NULL, 0)
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NODEMCU_MODULE(RTCMEM, "rtcmem", rtcmem, NULL);
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