OBJS+=CB_functions.o
OBJS+=usart1.o
OBJS+=spi2.o
-OBJS+=ltc1867l.o
# OBJS+=keypins.o
+++ /dev/null
-
-/*!
-LTC1867: 16-Bit 8-Channel 200ksps ADC
-
-The LTC1863/LTC1867 are pin-compatible, 8-channel 12-/16-bit A/D converters with
-serial I/O, and an internal reference. The ADCs typically draw only 1.3mA from a
-single 5V supply. The 8-channel input multiplexer can be configured for either
-single-ended or differential inputs and unipolar or bipolar conversions (or
-combinations thereof). The automatic nap and sleep modes benefit power sensitive
-applications.
-
-The LTC1867's DC performance is outstanding with a +/-2LSB INL specification and
-no missing codes over temperature. The signal-to-noise ratio (SNR) for the
-LTC1867 is typically 89dB, with the internal reference.
-
-*/
-
-#include <stdint.h>
-#include "ltc1867l.h"
-#include "spi.h"
-
-
-// Reads the ADC and returns 16-bit data
-void LTC1867_read(uint8_t adc_command, uint16_t *adc_code)
-{
- spi_writeTwoBytes((uint8_t)(adc_command & 0xFF), 0x00);
- *adc_code = 0;
-}
-
-// Calculates the LTC1867 input's unipolar voltage given the binary data and lsb weight.
-float LTC1867_unipolar_code_to_voltage(uint16_t adc_code, float LTC1867_lsb, int32_t LTC1867_offset_unipolar_code)
-{
- float adc_voltage;
- adc_voltage=((float)(adc_code+LTC1867_offset_unipolar_code))*LTC1867_lsb; //! 1) Calculate voltage from ADC code, lsb, offset.
- return(adc_voltage);
-}
-
-// Calculates the LTC1867 input's bipolar voltage given the two's compliment data and lsb weight
-float LTC1867_bipolar_code_to_voltage(uint16_t adc_code, float LTC1867_lsb, int32_t LTC1867_offset_bipolar_code)
-{
- float adc_voltage, sign = 1.0;
- if (adc_code>>15)
- {
- adc_code = (adc_code ^ 0xFFFF)+1; //! 1) Convert ADC code from two's complement to binary
- sign = -1;
- }
- adc_voltage=((float)(adc_code+LTC1867_offset_bipolar_code))*LTC1867_lsb*sign; //! 2) Calculate voltage from ADC code, lsb, offset.
- return(adc_voltage);
-}
-
-// Calibrate the lsb
-void LTC1867_cal_voltage(uint16_t zero_unipolar_code, uint16_t zero_bipolar_code, uint16_t fs_code, float zero_voltage, float fs_voltage, float *LTC1867_lsb, int32_t *LTC1867_offset_unipolar_code, int32_t *LTC1867_offset_bipolar_code)
-{
- float temp_offset;
- *LTC1867_lsb = (fs_voltage-zero_voltage)/((float)(fs_code - zero_unipolar_code)); //! 1) Calculate the LSB
-
- temp_offset = (zero_voltage/ *LTC1867_lsb) - zero_unipolar_code; //! 2) Calculate Unipolar offset
- //temp_offset = (temp_offset > (floor(temp_offset) + 0.5)) ? ceil(temp_offset) : floor(temp_offset); //! 3) Round
- *LTC1867_offset_unipolar_code = (int32_t)temp_offset; //! 4) Cast as int32_t
-
- temp_offset = (zero_voltage / *LTC1867_lsb) - zero_bipolar_code ; //! 5) Calculate Bipolar offset
- //temp_offset = (temp_offset > (floor(temp_offset) + 0.5)) ? ceil(temp_offset) : floor(temp_offset); //! 6) Round
- *LTC1867_offset_bipolar_code = (int32_t)temp_offset; //! 7) cast as int32_t
-}
+++ /dev/null
-
-/*!
-LTC1867: 16-bit 8-channel 200ksps ADC
-
-The LTC1863/LTC1867 are pin-compatible, 8-channel 12-/16-bit A/D converters
-with serial I/O, and an internal reference. The ADCs typically draw only 1.3mA
-from a single 5V supply. The 8-channel input multiplexer can be configured for
-either single-ended or differential inputs and unipolar or bipolar conversions
-(or combinations thereof). The automatic nap and sleep modes benefit power
-sensitive applications.
-
-The LTC1867's DC performance is outstanding with a +/-2LSB INL specification and
-no missing codes over temperature. The signal-to-noise ratio (SNR) for the
-LTC1867 is typically 89dB, with the internal reference.
-
-SPI DATA FORMAT (MSB First):
-
- Byte #1 Byte #2
-Data Out : D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
-Data In : SD OS S1 S0 COM UNI SLP X X X X X X X X X
-
-SD : Single/Differential Bit
-OS : ODD/Sign Bit
-Sx : Address Select Bit
-COM : CH7/COM Configuration Bit
-UNI : Unipolar/Bipolar Bit
-SLP : Sleep Mode Bit
-Dx : Data Bits
-X : Don't care
-
-
-Example Code:
-
-Read Channel 0 in Single-Ended Unipolar mode when input is with respect to GND
-
- adc_command = LTC1867_CH0 | LTC1867_UNIPOLAR_MODE; // Build ADC command for channel 0
- LTC1867_read(LTC1867_CS, adc_command, &adc_code); // Throws out last reading
- LTC1867_read(LTC1867_CS, adc_command, &adc_code); // Obtains the current reading and stores to adc_code variable
-
- // Convert adc_code to voltage
- adc_voltage = LTC1867_unipolar_code_to_voltage(adc_code, LTC1867_lsb, LTC1867_offset_unipolar_code);
-
-*/
-
-#ifndef LTC1867L_H
-#define LTC1867L_H
-
-//#include <SPI.h>
-
-//! Define the SPI CS pin
-#ifndef LTC1867_CS
-#define LTC1867_CS QUIKEVAL_CS
-#endif
-
-//! @name LTC1867 Single-Ended Channel Addresses, COM=GND
-//! @{
-// Single-Ended Channel Address When CH7/COM Pin Is used As CH7
-#define LTC1867_CH0 0x80
-#define LTC1867_CH1 0xC0
-#define LTC1867_CH2 0x90
-#define LTC1867_CH3 0xD0
-#define LTC1867_CH4 0xA0
-#define LTC1867_CH5 0xE0
-#define LTC1867_CH6 0xB0
-#define LTC1867_CH7 0xF0
-//!@}
-
-//! @name LTC1867 Differential Channel Addresses
-//! @{
-// Differential Channel Address When CH7/COM Pin Is Used As CH7
-#define LTC1867_P0_N1 0x00
-#define LTC1867_P1_N0 0x40
-
-#define LTC1867_P2_N3 0x10
-#define LTC1867_P3_N2 0x50
-
-#define LTC1867_P4_N5 0x20
-#define LTC1867_P5_N4 0x60
-
-#define LTC1867_P6_N7 0x30
-#define LTC1867_P7_N6 0x70
-//!@}
-
-//! @name LTC1867 Single-Ended Channel Addresses, COM=CH7
-//! @{
-// Channel Address When CH7/COM Pin Is Used As Common
-#define LTC1867_CH0_7COM 0x88
-#define LTC1867_CH1_7COM 0xC8
-#define LTC1867_CH2_7COM 0x98
-#define LTC1867_CH3_7COM 0xD8
-#define LTC1867_CH4_7COM 0xA8
-#define LTC1867_CH5_7COM 0xE8
-#define LTC1867_CH6_7COM 0xB8
-//!@}
-
-//! @name LTC1867 Sleep / Unipolar/Bipolar config bits
-//! @{
-// Sleep Mode Command
-#define LTC1867_SLEEP_MODE 0x02
-#define LTC1867_EXIT_SLEEP_MODE 0x00
-#define LTC1867_UNIPOLAR_MODE 0x04 // Bitwise OR with channel commands for unipolar mode
-#define LTC1867_BIPOLAR_MODE 0x00
-//!@}
-
-/*
- Example command
- adc_command = LTC1867_P0_N1; // Differential Bipolar Mode with CH0 as positive and CH1 as negative.
- adc_command = LTC1867_P0_N1 | LTC1867_UNIPOLAR_MODE; // Differential Unipolar Mode with CH0 as positive and CH1 as negative.
- */
-
-//! Reads the ADC and returns 16-bit data
-//! @return void
-void LTC1867_read(uint8_t adc_command, //!< Channel address, config bits ORed together
- uint16_t *adc_code //!< Returns code read from ADC (from previous conversion)
- );
-
-
-//! Calculates the LTC1867 input's unipolar voltage given the binary data and lsb weight.
-//! @return Floating point voltage
-float LTC1867_unipolar_code_to_voltage(uint16_t adc_code, //!< Raw ADC code
- float LTC1867_lsb, //!< LSB value (volts)
- int32_t LTC1867_offset_unipolar_code //!< Offset code
- );
-
-//! Calculates the LTC1867 input's bipolar voltage given the two's compliment data and lsb weight
-//! @return Floating point voltage
-float LTC1867_bipolar_code_to_voltage(uint16_t adc_code, //!< Raw ADC code
- float LTC1867_lsb, //!< LSB value (volts)
- int32_t LTC1867_offset_bipolar_code //!< Offset code
- );
-
-//! Calibrate the offset and LSB voltage given two measured offset codes, and a full-scale voltage with the corresponding code.
-//! @return Void
-void LTC1867_cal_voltage(uint16_t zero_unipolar_code, //!< Code from a unipolar zero reading
- uint16_t zero_bipolar_code, //!< Code from a bipolar zero reading
- uint16_t fs_code, //!< full-scale code
- float zero_voltage, //!< Measured zero voltage
- float fs_voltage, //!< Measured full-scale voltage
- float *LTC1867_lsb, //!< Return LSB value (volts)
- int32_t *LTC1867_offset_unipolar_code, //!< Return Unipolar Offset code, in floating point
- int32_t *LTC1867_offset_bipolar_code //!< Return Bipolar Offset code, in floating point
- );
-
-#endif // LTC1867_H
#include "CB_functions.h"
#include "usart1.h"
#include "spi2.h"
-#include "spi.h"
#include "periph_conf.h"
-#include "ltc1867l.h"
#define UC_NO_REGS 17
// SPIBuffer[1] = 0x5678;
init_USART1();
-
- spi_create(SPI1, GPIOA, GPIO_Pin_8);
spi_dma_shovel();
spi_addr=(spi_addr+1)%16;
-
-
- static uint8_t uni_bi_polar = LTC1867_UNIPOLAR_MODE; //!< The LTC1867 unipolar/bipolar mode selection
- static float LTC1867_lsb = 6.25009537E-5; //!< Ideal LSB voltage for a perfect part
- static int32_t LTC1867_offset_unipolar_code = 0; //!< Ideal unipolar offset for a perfect part
- static int32_t LTC1867_offset_bipolar_code = 0; //!< Ideal bipolar offset for a perfect part
- // Constants
- //! Lookup table to build the command for single-ended mode, input with respect to GND
- const uint8_t BUILD_COMMAND_SINGLE_ENDED[8] = {LTC1867_CH0, LTC1867_CH1, LTC1867_CH2, LTC1867_CH3,
- LTC1867_CH4, LTC1867_CH5, LTC1867_CH6, LTC1867_CH7
- }; //!< Builds the command for single-ended mode, input with respect to GND
- ////! Lookup table to build the command for single-ended mode with channel 7 as common pin
- //const uint8_t BUILD_COMMAND_SINGLE_ENDED_COM7[7] = {LTC1867_CH0_7COM, LTC1867_CH1_7COM, LTC1867_CH2_7COM, LTC1867_CH3_7COM,
- // LTC1867_CH4_7COM, LTC1867_CH5_7COM, LTC1867_CH6_7COM
- // }; //!< Builds the command for single-ended mode, input with respect to CH7
- ////! Lookup table to build the command for differential mode with the selected uni/bipolar mode
- //const uint8_t BUILD_COMMAND_DIFF[8] = {LTC1867_P0_N1, LTC1867_P2_N3, LTC1867_P4_N5, LTC1867_P6_N7,
- // LTC1867_P1_N0, LTC1867_P3_N2, LTC1867_P5_N4, LTC1867_P7_N6
- // }; //!< Build the command for differential mode
-
-
- uint8_t channel = 0;
- uint8_t adc_command; // The LTC1867 command byte
- uint16_t adc_code = 0; // The LTC1867 code
- //float adc_voltage; // The LTC1867 voltage
- adc_command = BUILD_COMMAND_SINGLE_ENDED[channel] | uni_bi_polar;
- LTC1867_read(adc_command, &adc_code); // Throws out last reading
- //delay(100);
- LTC1867_read(adc_command, &adc_code); // returnes ADC reading in adc_code
-
- //if (uni_bi_polar == LTC1867_UNIPOLAR_MODE)
- // adc_voltage = LTC1867_unipolar_code_to_voltage(adc_code, LTC1867_lsb, LTC1867_offset_unipolar_code);
- //else
- // adc_voltage = LTC1867_bipolar_code_to_voltage(adc_code, LTC1867_lsb, LTC1867_offset_bipolar_code);
}
#include "spi.h"
-#define BUFFER_SIZE 4
+#define BUFFER_SIZE 2
SPI_TypeDef * SPI_Module;
GPIO_TypeDef * CS_GPIO;
spi_chipSelect();
spi_enableTxInterrupt();
}
-
-void spi_writeFourBytes(uint8_t byte3, uint8_t byte2, uint8_t byte1, uint8_t byte0){
- while(spiBusyFlag){}
- spiTxCounter = 4;
- spiRxCounter = 4;
- spiBusyFlag = 1;
- spiDataBuffer[0] = byte0;
- spiDataBuffer[1] = byte1;
- spiDataBuffer[2] = byte2;
- spiDataBuffer[3] = byte3;
- spi_chipSelect();
- spi_enableTxInterrupt();
-}
void spi_handleSPI1Interrupt(void){
if(SPI_I2S_GetFlagStatus(SPI_Module, SPI_I2S_FLAG_RXNE) == SET){
spi_disableTxInterrupt();
}
}
-}
+}
\ No newline at end of file
jspc29 / mvd_firmware.git / commitdiff