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