Status I2C_ - Type 'Status' could not be resolved

[stehgold]

Hi,

I'm using Eclipse with gnuarm plugin http://gnuarmeclipse.sourceforge.net/, trying to read BMP085 pressure sensors. Where is Status defined ? I'll try uint32_t for now.

Have a nice weekend,
Stephan

[geoffreymbrown]

it's defined in I2C.h

#ifndef I2C_H#define I2C_H #include <stm32f10x_i2c.h> typedef enum {Error =
0, Success = !Error } Status; Status I2C_Read(I2C_TypeDef* I2Cx, uint8_t*
buf, uint32_t nbuf, uint8_t SlaveAddress);Status I2C_Write(I2C_TypeDef* I2Cx
, const uint8_t* buf, uint32_t nbuf, uint8_t SlaveAddress);void
I2C_LowLevel_Init(I2C_TypeDef* I2Cx, int ClockSpeed, int OwnAddress); #endif

On Sat, Oct 4, 2014 at 9:20 AM, Stephan Goldenberg <notifications@github.com

wrote:

Hi,

I'm using Eclipse with gnuarm plugin http://gnuarmeclipse.sourceforge.net/,
trying to read BMP085 pressure sensors. Where is Status defined ? I'll try
uint32_t for now.

Have a nice weekend,
Stephan

—
Reply to this email directly or view it on GitHub
#4.

[stehgold]

Ah, OK. This is not in the text I have.

[stehgold]

Hmm, does not compile. It's choking on this 'Timed(x)' construct and doesn't seem to like lables.

Edit: Ooops, that was me. I forgot the lines '// Wait for stop' and on in I2C_Read(). Compiles now :)

13:49:36 **** Incremental Build of configuration Debug for project stm32vl_i2c ****
make all
Building file: ../src/i2c.c
Invoking: Cross ARM C Compiler
arm-none-eabi-gcc -mcpu=cortex-m3 -mthumb -Og -fmessage-length=0 -fsigned-char -ffunction-sections -fdata-sections -Wall -Wextra -g3 -DDEBUG -DUSE_FULL_ASSERT -DTRACE -DOS_USE_TRACE_ITM -DSTM32F10X_MD_VL -DUSE_STDPERIPH_DRIVER -DHSE_VALUE=8000000 -DTimed=1 -I"../include" -I"../system/include" -I"../system/include/cmsis" -I"../system/include/stm32f1-stdperiph" -std=gnu11 -MMD -MP -MF"src/i2c.d" -MT"src/i2c.o" -c -o "src/i2c.o" "../src/i2c.c"
In file included from ../src/i2c.c:8:0:
../src/i2c.h:18:0: warning: "Timed" redefined [enabled by default]
#define Timed(x) Timeout = 0xFFFF; while (x){if (Timeout-- == 0) goto errReturn;}
^
:0:0: note: this is the location of the previous definition
../src/i2c.c: In function 'I2C_Read':
../src/i2c.c:166:3: error: label 'errReturn' used but not defined
Timed(!I2C_CheckEvent(I2Cx, I2C_EVENT_MASTER_BYTE_RECEIVED));
^
src/subdir.mk:24: recipe for target 'src/i2c.o' failed
make: *** [src/i2c.o] Error 1

[stehgold]

Hmm, no errors, no warnings - not working. ;( Using an LA I can see START - 0xEE (SlaveAddress) - ACK - 0xAA (RegisterAddress) - ACK - STOP. Now 2 bytes should be read: I see START and nothing more (SDA and SCL stay low), the SlaveAddress gets never send. MCU is trapped in exit.c. Hardware is working fine with Tiva Launchpad.

[geoffreymbrown]

I'm not sure I have enough info to help. When I get back home from
vacation in AZ next weekend I can send you a complete i2c application. At
the moment all I have is an ipad.

Geoffrey

On Tuesday, October 7, 2014, Stephan Goldenberg notifications@github.com
wrote:

Hmm, no errors, no warnings - not working. ;( Using an LA I can see START

• 0xEE (SlaveAddress) - ACK - 0xAA (RegisterAddress) - ACK - STOP. Now 2
  bytes should be read: I see START and nothing more (SDA and SCL stay low),
  the SlaveAddress gets never send. MCU is trapped in exit.c. Hardware is
  working fine with Tiva Launchpad.

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#4 (comment)
.

[stehgold]

Oooh, sorry. Enjoy your off time !

I got fishy and removed the Timed(... line after generate start and now anything is fine. MCU doesn't get trapped and I get sane values from the sensor. 26C, 989hPa - 1003hPa reported for my area. I don't know why waiting for I2C_EVENT_MASTER_MODE_SELECT fails.

Status I2C_Read(I2C_TypeDef* I2Cx, uint8_t* buf, uint32_t nbyte, uint8_t SlaveAddress){
__IO uint32_t Timeout = 0;
if (!nbyte) return Success;
// Wait for idle I2C interface
Timed(I2C_GetFlagStatus(I2Cx, I2C_FLAG_BUSY));
// Enable Acknowledgement, clear POS flag
I2C_AcknowledgeConfig(I2Cx, ENABLE);
I2C_NACKPositionConfig(I2Cx, I2C_NACKPosition_Current);
// Initiate Start Sequence (wait for EV5)
I2C_GenerateSTART(I2Cx, ENABLE);
// Timed(!I2C_GetFlagStatus(I2Cx, I2C_EVENT_MASTER_MODE_SELECT)); <- THIS LINE fails
// Send Address
I2C_Send7bitAddress(I2Cx, SlaveAddress, I2C_Direction_Receiver);
...

Enjoy your vacation,
Stephan