diff options
Diffstat (limited to 'tmk_core/tool/mbed/mbed-sdk/libraries/mbed/targets/hal/TARGET_Maxim/TARGET_MAX32600/analogout_api.c')
| -rw-r--r-- | tmk_core/tool/mbed/mbed-sdk/libraries/mbed/targets/hal/TARGET_Maxim/TARGET_MAX32600/analogout_api.c | 212 |
1 files changed, 212 insertions, 0 deletions
diff --git a/tmk_core/tool/mbed/mbed-sdk/libraries/mbed/targets/hal/TARGET_Maxim/TARGET_MAX32600/analogout_api.c b/tmk_core/tool/mbed/mbed-sdk/libraries/mbed/targets/hal/TARGET_Maxim/TARGET_MAX32600/analogout_api.c new file mode 100644 index 0000000000..c17b06e8b5 --- /dev/null +++ b/tmk_core/tool/mbed/mbed-sdk/libraries/mbed/targets/hal/TARGET_Maxim/TARGET_MAX32600/analogout_api.c @@ -0,0 +1,212 @@ +/******************************************************************************* + * Copyright (C) 2015 Maxim Integrated Products, Inc., All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included + * in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS + * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. + * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES + * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + * OTHER DEALINGS IN THE SOFTWARE. + * + * Except as contained in this notice, the name of Maxim Integrated + * Products, Inc. shall not be used except as stated in the Maxim Integrated + * Products, Inc. Branding Policy. + * + * The mere transfer of this software does not imply any licenses + * of trade secrets, proprietary technology, copyrights, patents, + * trademarks, maskwork rights, or any other form of intellectual + * property whatsoever. Maxim Integrated Products, Inc. retains all + * ownership rights. + ******************************************************************************* + */ + +#include "mbed_assert.h" +#include "analogout_api.h" +#include "clkman_regs.h" +#include "pwrman_regs.h" +#include "afe_regs.h" +#include "PeripheralPins.h" + +//****************************************************************************** +void analogout_init(dac_t *obj, PinName pin) +{ + // Make sure pin is an analog pin we can use for ADC + DACName dac = (DACName)pinmap_peripheral(pin, PinMap_DAC); + MBED_ASSERT((DACName)dac != (DACName)NC); + + // Set the object pointer + obj->dac = ((mxc_dac_regs_t*)MXC_DAC_GET_DAC((pin & 0x3))); + obj->dac_fifo = ((mxc_dac_fifo_t*)MXC_DAC_GET_FIFO((pin & 0x3))); + obj->index = (pin & 0x3); + + // Set the ADC clock to the system clock frequency + MXC_SET_FIELD(&MXC_CLKMAN->clk_ctrl, MXC_F_CLKMAN_CLK_CTRL_ADC_SOURCE_SELECT, + (MXC_F_CLKMAN_CLK_CTRL_ADC_GATE_N | (MXC_E_CLKMAN_ADC_SOURCE_SELECT_SYSTEM << + MXC_F_CLKMAN_CLK_CTRL_ADC_SOURCE_SELECT_POS))); + + + // Setup the OPAMP in follower mode + switch(obj->index) { + case 0: + // Enable DAC clock + MXC_CLKMAN->clk_ctrl_14_dac0 = MXC_E_CLKMAN_CLK_SCALE_ENABLED; + + // Enable OPAMP + MXC_AFE->ctrl5 &= ~MXC_F_AFE_CTRL5_OP_CMP0; + + // Set the positive and negative inputs + MXC_SET_FIELD(&MXC_AFE->ctrl4, (MXC_F_AFE_CTRL4_DAC_SEL_A | + MXC_F_AFE_CTRL4_P_IN_SEL_OPAMP0 | MXC_F_AFE_CTRL4_N_IN_SEL_OPAMP0), + ((0x1 << MXC_F_AFE_CTRL4_P_IN_SEL_OPAMP0_POS) | + (0x1 << MXC_F_AFE_CTRL4_N_IN_SEL_OPAMP0_POS) | + (0x0 << MXC_F_AFE_CTRL4_DAC_SEL_A_POS))); + + // Enable N and P channel inputs + MXC_AFE->ctrl3 |= (MXC_F_AFE_CTRL3_EN_PCH_OPAMP0 | + MXC_F_AFE_CTRL3_EN_NCH_OPAMP0); + break; + case 1: + // Enable DAC clock + MXC_CLKMAN->clk_ctrl_15_dac1 = MXC_E_CLKMAN_CLK_SCALE_ENABLED; + + // Enable OPAMP + MXC_AFE->ctrl5 &= ~MXC_F_AFE_CTRL5_OP_CMP1; + + // Set the positive and negative inputs + MXC_SET_FIELD(&MXC_AFE->ctrl4, (MXC_F_AFE_CTRL4_DAC_SEL_B | + MXC_F_AFE_CTRL4_P_IN_SEL_OPAMP1 | MXC_F_AFE_CTRL4_N_IN_SEL_OPAMP1), + ((0x1 << MXC_F_AFE_CTRL4_P_IN_SEL_OPAMP1_POS) | + (0x1 << MXC_F_AFE_CTRL4_N_IN_SEL_OPAMP1_POS) | + (0x1 << MXC_F_AFE_CTRL4_DAC_SEL_B_POS))); + + // Enable N and P channel inputs + MXC_AFE->ctrl3 |= (MXC_F_AFE_CTRL3_EN_PCH_OPAMP1 | + MXC_F_AFE_CTRL3_EN_NCH_OPAMP1); + + break; + case 2: + // Enable DAC clock + MXC_CLKMAN->clk_ctrl_16_dac2 = MXC_E_CLKMAN_CLK_SCALE_ENABLED; + + // Enable OPAMP + MXC_AFE->ctrl5 &= ~MXC_F_AFE_CTRL5_OP_CMP2; + + // Set the positive and negative inputs + MXC_SET_FIELD(&MXC_AFE->ctrl4, (MXC_F_AFE_CTRL4_DAC_SEL_C | + MXC_F_AFE_CTRL4_P_IN_SEL_OPAMP2 | MXC_F_AFE_CTRL4_N_IN_SEL_OPAMP2), + ((0x1 << MXC_F_AFE_CTRL4_P_IN_SEL_OPAMP2_POS) | + (0x1 << MXC_F_AFE_CTRL4_N_IN_SEL_OPAMP2_POS) | + (0x2 << MXC_F_AFE_CTRL4_DAC_SEL_C_POS))); + + // Enable N and P channel inputs + MXC_AFE->ctrl3 |= (MXC_F_AFE_CTRL3_EN_PCH_OPAMP2 | + MXC_F_AFE_CTRL3_EN_NCH_OPAMP2); + break; + case 3: + // Enable DAC clock + MXC_CLKMAN->clk_ctrl_17_dac3 = MXC_E_CLKMAN_CLK_SCALE_ENABLED; + + // Enable OPAMP + MXC_AFE->ctrl5 &= ~MXC_F_AFE_CTRL5_OP_CMP3; + + // Set the positive and negative inputs + MXC_SET_FIELD(&MXC_AFE->ctrl4, (MXC_F_AFE_CTRL4_DAC_SEL_D | + MXC_F_AFE_CTRL4_P_IN_SEL_OPAMP3 | MXC_F_AFE_CTRL4_N_IN_SEL_OPAMP3), + ((0x1 << MXC_F_AFE_CTRL4_P_IN_SEL_OPAMP3_POS) | + (0x1 << MXC_F_AFE_CTRL4_N_IN_SEL_OPAMP3_POS) | + (0x3 << MXC_F_AFE_CTRL4_DAC_SEL_D_POS))); + + // Enable N and P channel inputs + MXC_AFE->ctrl3 |= (MXC_F_AFE_CTRL3_EN_PCH_OPAMP3 | + MXC_F_AFE_CTRL3_EN_NCH_OPAMP3); + break; + } + + // Enable AFE power + MXC_PWRMAN->pwr_rst_ctrl |= MXC_F_PWRMAN_PWR_RST_CTRL_AFE_POWERED; + + // Setup internal voltage references + MXC_SET_FIELD(&MXC_AFE->ctrl1, (MXC_F_AFE_CTRL1_REF_DAC_VOLT_SEL | MXC_F_AFE_CTRL1_REF_ADC_VOLT_SEL), + (MXC_F_AFE_CTRL1_REF_ADC_POWERUP | MXC_F_AFE_CTRL1_REF_BLK_POWERUP | + (MXC_E_AFE_REF_VOLT_SEL_1500 << MXC_F_AFE_CTRL1_REF_ADC_VOLT_SEL_POS))); + + // Disable interpolation + obj->dac->ctrl0 &= MXC_F_DAC_CTRL0_INTERP_MODE; +} + +//****************************************************************************** +void analogout_write(dac_t *obj, float value) +{ + analogout_write_u16(obj, (uint16_t)((value/1.0) * 0xFFFF)); +} + +//****************************************************************************** +void analogout_write_u16(dac_t *obj, uint16_t value) +{ + // Enable the OPAMP + // Setup the OPAMP in follower mode + switch(obj->index) { + case 0: + MXC_AFE->ctrl3 |= MXC_F_AFE_CTRL3_POWERUP_OPAMP0; + break; + case 1: + MXC_AFE->ctrl3 |= MXC_F_AFE_CTRL3_POWERUP_OPAMP1; + break; + case 2: + MXC_AFE->ctrl3 |= MXC_F_AFE_CTRL3_POWERUP_OPAMP2; + break; + case 3: + MXC_AFE->ctrl3 |= MXC_F_AFE_CTRL3_POWERUP_OPAMP3; + break; + } + + // Output 1 sample with minimal delay + obj->dac->rate |= 0x1; + + // Set the start mode to output once data is in the FIFO + obj->dac->ctrl0 &= ~(MXC_F_DAC_CTRL0_START_MODE | MXC_F_DAC_CTRL0_OP_MODE); + + // Enable the DAC + obj->dac->ctrl0 |= (MXC_F_DAC_CTRL0_POWER_MODE_2 | + MXC_F_DAC_CTRL0_POWER_MODE_1_0 | MXC_F_DAC_CTRL0_POWER_ON | + MXC_F_DAC_CTRL0_CLOCK_GATE_EN | MXC_F_DAC_CTRL0_CPU_START); + + if(obj->index < 2) { + obj->out = (value); + obj->dac_fifo->output_16 = (obj->out); + + } else { + // Convert 16 bits to 8 bits + obj->out = (value >> 8); + obj->dac_fifo->output_8 = (obj->out); + } +} + +//****************************************************************************** +float analogout_read(dac_t *obj) +{ + return (((float)analogout_read_u16(obj) / (float)0xFFFF) * 1.5); +} + +//****************************************************************************** +uint16_t analogout_read_u16(dac_t *obj) +{ + if(obj->index < 2) { + // Convert 12 bits to 16 bits + return (obj->out << 4); + } else { + // Convert 8 bits to 16 bits + return (obj->out << 8); + } +} |