Публикация версии 1.75

configure

@@ -1,6 +1,6 @@
 #! /bin/sh
 # Guess values for system-dependent variables and create Makefiles.
-# Generated by GNU Autoconf 2.71 for bcm2835 1.74.
+# Generated by GNU Autoconf 2.71 for bcm2835 1.75.
 #
 # Report bugs to <mikem@airspayce.com>.
 #
@@ -610,8 +610,8 @@ MAKEFLAGS=
 # Identity of this package.
 PACKAGE_NAME='bcm2835'
 PACKAGE_TARNAME='bcm2835'
-PACKAGE_VERSION='1.74'
-PACKAGE_STRING='bcm2835 1.74'
+PACKAGE_VERSION='1.75'
+PACKAGE_STRING='bcm2835 1.75'
 PACKAGE_BUGREPORT='mikem@airspayce.com'
 PACKAGE_URL=''
 
@@ -1274,7 +1274,7 @@ if test "$ac_init_help" = "long"; then
   # Omit some internal or obsolete options to make the list less imposing.
   # This message is too long to be a string in the A/UX 3.1 sh.
   cat <<_ACEOF
-\`configure' configures bcm2835 1.74 to adapt to many kinds of systems.
+\`configure' configures bcm2835 1.75 to adapt to many kinds of systems.
 
 Usage: $0 [OPTION]... [VAR=VALUE]...
 
@@ -1341,7 +1341,7 @@ fi
 
 if test -n "$ac_init_help"; then
   case $ac_init_help in
-     short | recursive ) echo "Configuration of bcm2835 1.74:";;
+     short | recursive ) echo "Configuration of bcm2835 1.75:";;
    esac
   cat <<\_ACEOF
 
@@ -1437,7 +1437,7 @@ fi
 test -n "$ac_init_help" && exit $ac_status
 if $ac_init_version; then
   cat <<\_ACEOF
-bcm2835 configure 1.74
+bcm2835 configure 1.75
 generated by GNU Autoconf 2.71
 
 Copyright (C) 2021 Free Software Foundation, Inc.
@@ -1560,7 +1560,7 @@ cat >config.log <<_ACEOF
 This file contains any messages produced by compilers while
 running configure, to aid debugging if configure makes a mistake.
 
-It was created by bcm2835 $as_me 1.74, which was
+It was created by bcm2835 $as_me 1.75, which was
 generated by GNU Autoconf 2.71.  Invocation command line was
 
   $ $0$ac_configure_args_raw
@@ -2823,7 +2823,7 @@ fi
 
 # Define the identity of the package.
  PACKAGE='bcm2835'
- VERSION='1.74'
+ VERSION='1.75'
 
 
 printf "%s\n" "#define PACKAGE \"$PACKAGE\"" >>confdefs.h
@@ -5866,7 +5866,7 @@ cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
 # report actual input values of CONFIG_FILES etc. instead of their
 # values after options handling.
 ac_log="
-This file was extended by bcm2835 $as_me 1.74, which was
+This file was extended by bcm2835 $as_me 1.75, which was
 generated by GNU Autoconf 2.71.  Invocation command line was
 
   CONFIG_FILES    = $CONFIG_FILES
@@ -5934,7 +5934,7 @@ ac_cs_config_escaped=`printf "%s\n" "$ac_cs_config" | sed "s/^ //; s/'/'\\\\\\\\
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 ac_cs_config='$ac_cs_config_escaped'
 ac_cs_version="\\
-bcm2835 config.status 1.74
+bcm2835 config.status 1.75
 configured by $0, generated by GNU Autoconf 2.71,
   with options \\"\$ac_cs_config\\"
 

configure.ac

@@ -6,7 +6,7 @@ dnl (C) 2012 Mike McCauley (mikem@airspayce.com)
 
 dnl Dont forget to update  BCM2835_VERSION and .tar.gz in bcm2835.h
 dnl and the zip file.
-AC_INIT([bcm2835], [1.74], [mikem@airspayce.com])
+AC_INIT([bcm2835], [1.75], [mikem@airspayce.com])
 
 AC_CONFIG_HEADERS(config.h:config.h.in)
 AM_INIT_AUTOMAKE()

src/bcm2835.c

@@ -1109,7 +1109,8 @@ void bcm2835_aux_spi_transfernb(const char *tbuf, char *rbuf, uint32_t len) {
 
 	while ((tx_len > 0) || (rx_len > 0)) {
 
-		while (!(bcm2835_peri_read(stat) & BCM2835_AUX_SPI_STAT_TX_FULL) && (tx_len > 0)) {
+	    while (!(bcm2835_peri_read(stat) & BCM2835_AUX_SPI_STAT_TX_FULL) && (tx_len > 0) && (tx_len + BCM2835_AUX_SPI_FIFO_SIZE * 3 > rx_len))
+	    {
 			count = MIN(tx_len, 3);
 			data = 0;
 
@@ -1129,7 +1130,8 @@ void bcm2835_aux_spi_transfernb(const char *tbuf, char *rbuf, uint32_t len) {
 
 		}
 
-		while (!(bcm2835_peri_read(stat) & BCM2835_AUX_SPI_STAT_RX_EMPTY) && (rx_len > 0)) {
+		while (!(bcm2835_peri_read(stat) & BCM2835_AUX_SPI_STAT_RX_EMPTY) && (rx_len > 0))
+		{
 			count = MIN(rx_len, 3);
 			data = bcm2835_peri_read(io);
 
@@ -1151,7 +1153,8 @@ void bcm2835_aux_spi_transfernb(const char *tbuf, char *rbuf, uint32_t len) {
 			rx_len -= count;
 		}
 
-		while (!(bcm2835_peri_read(stat) & BCM2835_AUX_SPI_STAT_BUSY) && (rx_len > 0)) {
+		while (!(bcm2835_peri_read(stat) & BCM2835_AUX_SPI_STAT_BUSY) && (rx_len > 0) && (tx_len == 0))
+		{
 			count = MIN(rx_len, 3);
 			data = bcm2835_peri_read(io);
 

src/bcm2835.h

@@ -27,7 +27,7 @@
   BCM 2835).
   
   The version of the package that this documentation refers to can be downloaded 
-  from http://www.airspayce.com/mikem/bcm2835/bcm2835-1.74.tar.gz
+  from http://www.airspayce.com/mikem/bcm2835/bcm2835-1.75.tar.gz
   You can find the latest version at http://www.airspayce.com/mikem/bcm2835
   
   Several example programs are provided.
@@ -218,6 +218,15 @@
   - P1-40 (CLK)
   - P1-36 (CE2)
 
+  Caution: The bcm2835 library works directly on the SPI/I2C devices. It is not using 
+  any Linux device drivers. When relevant Linux drivers are loaded or 
+  activated then it can create unexpected behavior from other software like 
+  'i2cdetect'.
+  
+  Here is a simple utility which detects I2C bus devices with the bcm2835 
+  library.
+  https://github.com/gavinlyonsrepo/RPI_Tools/tree/main/src/i2cdetect
+
   \par I2C Pins
   
   The bcm2835_i2c_* functions allow you to control the BCM 2835 BSC interface,
@@ -631,6 +640,11 @@
   \version 1.74
   Timeout in bcm2835_i2c_write() increased by a factor of 10 because some users have reported spurious timeouts at slow speeds.
 
+  \version 1.75
+  Patches to bcm2835_aux_spi_transfernb() from Sean Goff to deal with the case where
+  the process is interrupted between filling the TX FIFO and reading the RX FIFO.
+
+  
   \author  Mike McCauley DO NOT CONTACT THE AUTHOR DIRECTLY: USE THE LISTS
 */
 
@@ -646,7 +660,7 @@
 /* Needed to compile with gcc -std=c99, as reported by John Blaiklock.*/
 #include <fcntl.h>
 
-#define BCM2835_VERSION 10074 /* Version 1.74 */
+#define BCM2835_VERSION 10075 /* Version 1.75 */
 
 // Define this if you want to use libcap2 to determine if you have the cap_sys_rawio capability
 // and therefore the capability of opening /dev/mem, even if you are not root.
@@ -1217,6 +1231,7 @@ typedef enum
 #define BCM2835_BSC_S_TA 		0x00000001 /*!< Transfer Active */
 
 #define BCM2835_BSC_FIFO_SIZE   	16 /*!< BSC FIFO size */
+#define BCM2835_AUX_SPI_FIFO_SIZE       4
 
 /*! \brief bcm2835I2CClockDivider
   Specifies the divider used to generate the I2C clock from the system clock.