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- // Module for interfacing with adc
- #include "module.h"
- #include "lauxlib.h"
- #include "platform.h"
- #include "c_types.h"
- #include "user_interface.h"
- // Lua: read(id) , return system adc
- static int adc_sample( lua_State* L )
- {
- unsigned id = luaL_checkinteger( L, 1 );
- MOD_CHECK_ID( adc, id );
- unsigned val = 0xFFFF & system_adc_read();
- lua_pushinteger( L, val );
- return 1;
- }
- // Lua: readvdd33()
- static int adc_readvdd33( lua_State* L )
- {
- lua_pushinteger(L, system_get_vdd33 ());
- return 1;
- }
- // Lua: adc.force_init_mode(x)
- static int adc_init107( lua_State *L )
- {
- uint8_t byte107 = luaL_checkinteger (L, 1);
- uint32 init_sector = flash_rom_get_sec_num () - 4;
- // Note 32bit alignment so we can safely cast to uint32 for the flash api
- char init_data[SPI_FLASH_SEC_SIZE] __attribute__((aligned(4)));
- if (SPI_FLASH_RESULT_OK != flash_read (
- init_sector * SPI_FLASH_SEC_SIZE,
- (uint32 *)init_data, sizeof(init_data)))
- return luaL_error(L, "flash read error");
- // If it's already the correct value, we don't need to force it
- if (init_data[107] == byte107)
- {
- lua_pushboolean (L, false);
- return 1;
- }
- // Nope, it differs, we need to rewrite it
- init_data[107] = byte107;
- if (SPI_FLASH_RESULT_OK != flash_erase (init_sector))
- return luaL_error(L, "flash erase error");
- if (SPI_FLASH_RESULT_OK != flash_write (
- init_sector * SPI_FLASH_SEC_SIZE,
- (uint32 *)init_data, sizeof(init_data)))
- return luaL_error(L, "flash write error");
- lua_pushboolean (L, true);
- return 1;
- }
- // Module function map
- static const LUA_REG_TYPE adc_map[] = {
- { LSTRKEY( "read" ), LFUNCVAL( adc_sample ) },
- { LSTRKEY( "readvdd33" ), LFUNCVAL( adc_readvdd33 ) },
- { LSTRKEY( "force_init_mode" ), LFUNCVAL( adc_init107 ) },
- { LSTRKEY( "INIT_ADC" ), LNUMVAL( 0x00 ) },
- { LSTRKEY( "INIT_VDD33" ),LNUMVAL( 0xff ) },
- { LNILKEY, LNILVAL }
- };
- NODEMCU_MODULE(ADC, "adc", adc_map, NULL);
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